What is the max length travel trailer you think is practical

25' ball to bumper is the maximum length I will go. Anything longer than that will not fit into some of the boondock sites I like. The bonus is that I fit everywhere else with no issues.

I come from a backpacking background, and spend the majority of my time outside of the trailer. I don't care about television sight lines (there's no tv) or recliners (I'm outside until it's time to turn in).