Well.. talking about some experiences about being too big.
When on vacations in Baja, California with our 40' conversion, I saw a road to "San Francisco del la???"
I just could not pass that gravel road. So we drove about 5 miles on gravel road with beautiful cactus desert around till we come to small hill with sharp turn.
I tried to make multi-point turn, but loose gravel start giving up and my front wheels started to sink.
That was the point I gave up on going forward, but there was not a spot for U-turn neither.
I ended up going 1 mile on reverse. Rear camera help, but it did not have long range, so I put my wife in rear bedroom as additional eyes.
Coach made it fine, but wife was not happy after few minutes on the bed above hot engine.
(we have AC in front living only)