I'll add my 2 cents to John Blue and Texasrvers. Keep from repairing anything with duct tape, blue tarps, cardboard and ropes and you'll be fine.
In our 4 years on the road, we rarely see this 5 or 10 year old disclaimer.
There are a couple Outdoor Resorts parks we have checked out. Both have the 10 year thing, (one also limits to Class A's only.) They try to screen folks over the phone when making reservations. (Note: NEITHER of these examples are over night parks. One is REALLY out of the way, and the other has several, less fussy parks, nearby.)
Been in the office of both, when folks have pulled in w/o reservations. Ladies at the desk, got up and looked at the rigs from the door. If the rig was a traditional shape/size, made in the last 20 years, clean, without obvious damage or torn drapes blowing out a window, they passed. Now these parks charge upward of $65 bucks a night. They cater to the high end crowd, but want your camping dollar just like everyone else.
We spent some time this summer in a nice park, that I wish HAD some kind of disclaimer. All the seasonal and full time folks have made adorable container gardens and outdoor seating areas. They all make the effort (yes, even the single guys working in the area) to keep their areas UNCLUTTERED...except one.
Of course his trailer predates the current managment. They are just going to outlast him. I'm giving his rig one more hard winter and the cardboard will give out.