Our pod was great when we were mostly camping, only going inside to sleep, grab a snack or use the restroom.  When we started doing a lot of touring and there were overnights at rest stops and truck stops, there wasn't enough room for 4 of us especially w/o a slide-out (the slide-out models didn't exist until literally the week we bought our 171).  I also got tired of drying out the shower and crawling over my wife at 2 am to get to the toilet.  Some of these things aren't an issue with the newer pod models.

Denise, 

Having had all sorts of TTs and RVs here is my 2 cents.  

Think about how you are going to use it.  Just one night stays or lengthy stays in a single location?  Do you plan to cook over the fire or inside using the appliances.  How much time do you plan to spend actually in the unit.  Small is good most of the time, but several days in a small unit during rain or bad weather can be a bummer.

RVs in most cases requires another vehicle or transportation source.  As obvious as this should be, years ago we took our Class C to camp along a bike trail.  Fortunately we had two bikes, unfortunately one had a very bad tire.  Since we were already set up I had to ride 8-10 miles each way to a small town get hubby's tire repaired.  If you forget anything or run out of anything you have to break camp to drive to the nearest town with a grocery, auto parts store, or whatever your need is.  I didn't like to temporarily break camp and leave anything at the camp site for fear it would sprout legs while we we gone.