Question about length

Having narrowed down our fiver choices based on full-time warranty, construction quality, and floorplans that suit us, my question is how long is too long? We are looking at between 37 and 40 foot for full time use. Is the shorter (3 ft) length enough to get us into more places, or is it not enough difference to be concerned. Either one in long, I know.

If you are going to live in it full time that would be my most important consideration. Get what works for your home, not what might fit or not in a park. If you cannot get into a park because you are too long or tall, stay somewhere else and drive the truck to where you want to visit for a day or two.