Electrical Hookups When Camping?

So we almost always have the "basics" W/E. But as we age, we find we like FHU's the best, especially as our trips start to be 2-4 weeks long. Not having to A) use someone else's bathroom, and B) not have to tote a tank at any point during the stay, are trade offs I am willing to make to get in the outdoors as much as possible. A lot of our trips revolve around hiking, walking, cycling, and sightseeing.. none of which you do right at the camper anyways. But a little research with google maps and such, and you can tell if a CG is to tight etc. For 7 days or less we can roll completely self contained no problem. With FHU's at home, if need be, we can roll home to dump/flush.

We have KOA'd 2 nights total, but not in one of the resort or destination parks.Our annual 2 week holiday trip to HBSP, we like the "old CG" now known as the "North CG", much more then the "new CG" known as the "South CG" BUT.. only about 15% of the NCG sites are FHU, where 100% of the South are.. so MUCH easier to get a spot in the new section, even if it means being closer to other sites.. For next year, we mitigated as much as we could, we and our camping partners reserved spots at the very end, and across from each other, so we will have nothing but nature in front of us..

One nice thing is, around here, (TN, KY, IN) many many state parks have very nice site spacing AND E hookups. Some have E/W, and very few sites or parks have W/E/S..

We try an avoid private campgrounds, but use them some times when rolling to and from home on a long trip. 

I have not fully calculated, but I expect we can count ourselves in the "not very often" category, which is my vote. We spend a lot of time on the road with overnight stops with no connections. Some of our time was spent in driveways of friends where we had partial connections (15A electricity, no water or sewer). That 15A also meant that we still mainly operated on propane since I wanted to be a good guest and not run up the power bill. Plus 15A is not sufficient for running the AC anyway. It made sure the batteries stayed charged.

We have stayed with full hook-ups and do appreciate it when we have them. Most recently was at the Kentucky Mini-Mini/ 10th Anniversary R-Pod Rally. However, these times seem to be more the exception. We have stayed at a state park in Vermont twice which had no connections available except for the camp host (not us). I guess for us, there are too many places to see to sit in one spot for too long.

The drawbacks are cost and weight. These are low frequency inverters so have heavy magnetics. Generally they weigh around 60 lbs for a 3kW model. Costs range around $750 to $1500 depending on which brand you choose. These are pretty smart inverters so most can also be set up for Li battery charging, which offsets some of the cost hit if you're planning to get the lead out at the same time. 

If I was going to spend a lot of time connected to a limited output ac source I would definitely consider getting one, but I'm planning to move over to high current dc tow vehicle charging while not grid connected, allowing me to leave my generator at home. And I don't expect to find myself plugged into 15A circuits very often, if ever.