Again, I appreciate all the input. It appears, however, all larger homes are the same height and width, length and wheel base being the big differences. Turn radius, obviously, is the possible problem. After looking at numerous camp sites many limit the size to 32-35 ft. homes. I'd guess this is a difficult question to answer, but as wa8yxm wrote, he squeezes a bigger rig into a smaller spot. Are these lengths strictly enforced? One other thing I must admit to, I've never driven a "big rig" as one of you had written. I flew Boeing 777 airplanes with 200 foot wing spans weighing up to 648,000 lbs. Energy management and avoiding other obstacles was no easy task. It taught me a lot......no I never hit another airplane.
Thanks again!