It's all about maneuverability. I just did 5K on my small C and went to places I would never consider in a bigger C or a class A ( I had both bigger C's and class A ).
My thoughts were always " if you're going to spend X amount on an RV get the biggest you can for the money. Well I did that and made a mistake, because I never could take it to many areas that I wanted to go.
On this last trip I used the small C as a vacation car, a camper, a resting place when the wife and daughter went shopping, essentially it went everywhere.
In the past I would go from RV spot to RV spot and that was it, then we were suck with no toad.
The small C get me everywhere and I get to sleep in it to boot.