The PNW has a distinct drier season from July to early September.  This of course coincides with the peak tourist season. 

RV travel is very common and of course nearly all RV's have propane tanks. For the most part the rule is that you need to have all propane appliances turned off so there is no active flame burning...(in the event they had some kind of fuel leak or escaping fumes inside ferry where vehicles are parked.) I have never heard of a ferry where the propane tank itself was not allowed on board.  

Oh yeah,....I misread your earlier post and thought you had taken one of the ferries over to Vancouver Island. You were in the "city" of Vancouver which is a short drive north across the border from Bellingham WA where I live. "Vancouver island" is a massive island almost like a country in itself. I really want to go up there, camp and explore the island. You have to take a ferry to get there and it can be quite expensive if you are towing a trailer and I was wondering what it might cost. The olympic Peninsula is also awesome to visit. Glad you had a good time there in Sequim, Hurricane Ridge, etc. WA state is beautiful state to explore when the weather is good. 

Bc ferries has a website for making a reservation so getting on the ferry is much easier, but I would suggest if you do not want to make a reservation just don’t travel on the weekend. There are BC ferries that leave from a place called horseshoe bay and they go to landing just outside of the small city of Nanaimo. From naniamo up the island is most of the camping. I’m so used to living here and venturing i’m so used to living here and venturing around our area that places like Victoria Don’t impress me anymore as I just see it as another city. I will try to look at it from the perspective of a visitor not use.don’t impress me anymore as I just see it as another city. I will try to look at it from the perspective of a visitor never seeing our west coast. Here’s some tips:

Victoria is not for camping with rvs. but offers itself as a tourist town where USA cruise ships land on the way to Alaska. It’s well set up for walking and cycling,exploring shops and has a British influence in pubs and stone buildings. You can find camping outside of the city and bus systems are really good at getting into it.

From Victoria to port Renfrew, there are wonderful beaches with some provincial parks for camping. Provincial parks, and British Columbia can be booked on their website for months in advance of arrival.

For simple way of finding camping use Google Maps. Zoom. In on the area you an Zoom. In on the area you are interested. and type in the search area the word camping.

With out listing them here from Nanaimo up the island there is tons of camping. I would recommend Tofino ( famous for surfing) if you have never seen at West Coast beach as it also travels through a place called Cathedral Grove that has a display of large West Coast trees to walk through. 

Another way to the lower part of the island is the ferry from tswasssen to Swartz bay. BC ferries has been at this a long time and part of the British Columbia highway system. They are extremely well set up and he will have no problems figuring it out. Ferries leave every one and a half hours. often I don’t book a reservation and just show up and I have no problem waiting a little bit to get on the next one. A big recommendation is do not travel on a long weekend as families are always trying to reunite, and the system gets extremely busy.

we were in Vancouver, but I'm not sure about Vancouver Island. We did not camp at Vancouver-we parked the Pod and visited friends for a week-mostly tourist places.  We did go to Bouchart Gardens and did a whale watching trip. both were very good and worthy of the time and cost.

I don't remember a ferry-I think we took a bridge from Canada that landed us in Washington. We went to Port Angeles, Hurricane Ridge, Sequim and several other places in north Washington. It was beautiful and the weather was fine.

Travel safe and often

Vann

Your best route would be to get to the coast somewhere in southern Oregon and go north from there if time permits. Oregon coast is awesome. Then just go all the way north into Washington until you get to Olympic Peninsula. There are countless camp grounds all along the way, but that time of year the ones on the coast are very busy. You would have more luck finding certified camp spots by heading inland on one of the access roads. Once you get well up into the Olympic Peninsula there will be more availability. 

Which ferries did you use to get to and from Vancouver island? And what did it cost for vehicle and trailer? Any special must see places or camp sites you ran into on Vancouver Island?

For the Olympic Peninsula,.. mid July thru mid September are the best times for weather. However you still need to check forecast probably a few days before launching. If you are coming from a long way away and you need to plan way ahead of time, last week in July is known to be almost a guarantee of nice weather here in Northwest WA. Most of the big outdoor events are planned around that time. Hobuck Beach near Neah bay can become pretty busy around then too. It's popular with the surfers, but if you get there on a week day it's usually not too bad. I have never not been able to find a good spot to camp. Of course there are countless other places to camp out on the Olympic Peninsula. Note*...Town of Near bay is part of the Makah reservation. It's not touristy at all, but they do have a full service store, fuel, etc. And the Makah's do welcome visitors. Visitors who come and spend money are a big part of their overall economy. Alcohol is not allowed on the reservation so if you bring any make sure you keep very discreet about it. 

I agree with Johnny Mac.

We camped at Hobuck and hiked to ShiShi-wonderful place.

It is the end of the world type location.  As I recall there is one fairly complete store just as you enter the reservation area that had gas, ice, water, and other essentials.

The stars were outstanding!

the entire north western coast is phenomenal. We took a month to go from Vancouver down to the Golden Gate bridge and it was a fantastic trip.Washington, Oregon and northern California are beautiful in many different ways

Travel safe and often

Vann