I can certainly ask every RV owner to agree to it and they are free to accept my terms or look for another lot. Or maybe I can say that every RV will be sniffed by a dog and in case it detects something, the RV will be entered to check for compliance with the rule.

Edit: to be clear, what I'm trying to say is that there are 2 parties entering an agreement here, the owner of the infrastructure also has some rights because we recognize the rights to private property.