I like the idea of a van better than a trailer personally. Though a Boler would be sweet! A friend of mine upgraded his "camping" setup this year with this:
New truck, new trailer. It's a diesel at least. He is not the kind of person that ever drives slow, and his first trip in it was to a campground up in the mountains, so a lot of steep climbing that he would not slow down for. Still, somehow this all managed 12.5-13 mpg average for the trip! Interesting to think that with a different driver something as heavy as this set up might be able to get some half decent FE, for what it is. Though, up here, that combo, brand new, going down the road after taxes etc etc is probably pushing close to $100k - hmmm ya I think my RV budget is about 2% of that lol