Depends on what you are looking for.. Campground I move to tomorrow is across from a brand new LOVES they have RV parking.. (Don't know about dump) I have been to one that did though. Same for T/A some do some do not.
I have also been to a flying J that did NOT have RV parking.. and I'm about to pay for that.
If you must park among the trucks and your RV has slideouts and is designed so you gotta slide one (or more) out try to park so the slides extend OUT of the lot over grass so the trucks can't knock 'em off.