The RV show is held on the ground of the Motorhome and RV Hall of Fame in Indiana, which houses the hall of fame (founding fathers of some of brands like Winnebago, dealers, campground owners), and antique motorhomes and TT's and a full library.
I may be a little off on the models and years of these. The images may be a little shaky. They were taken with my itty bitty cell phone instead of my camera.
1913 Model T
1929 Covered Wagon
1931 trailer used by Mae West (wonder what she'd think of move star trailers now)
1936 Road Home
1936 Road Home bath tube !?!
Another 1936 Road Home1954 Spartan Imperial (looks like a cross between an Airstream and a VW van)
1963 Mallard
1974 GMC motorhome
1988 Star Streak
The inside of a 1935 Bowlus (looks like a boats hull)
1954 Yellowstone
Some others I don't have the name of. It's amazing how similar they are to today's models on the inside. I saw a lot of the same floor plans, but now they are more lightweight, but since the manufacturers still like dark wood, the biggest similarity is they are all dark on the inside with or without electrical).