A lot to be said for TT's in the lower 20 ft. range. We went around the country twice in a 1989 Wilerness 22ft (19ft body) w/o a slide. It was laid out well with dinette in front, side bath & kitchen, back bedroom, 2 door.
Never had a problem getting into sites. Have now got the larger 28ft. below w/slide, and have yet to have a problem getting into a site BUT we are heading for Yosemite this month and have a 35ft. site recomended for 24ft. TT's due to trees, so we will see if we can get into it! Love the 3x11 slide though!