Well, you've touched on the only issue that would make me reluctant to purchase another Roadtrek. :(
I have about a 5" clearance and break into a sweat just thinking about taking her off-road. I haven't really tried it yet and fortunately haven't had to, but I don't think it would go well.
Even driving on a gravel road can be problematic when I get up to speed back on blacktop. The gravel releases from the tire tread and pings all around the undercarriage like a pinball machine. It's unsettling and potentially harmful to the soft underbelly, I imagine.
OTOH, I consider my RT to be extremely well-insulated. This was rather a surprise to me until I realized that RTs are made in Canada.
