It's really no different than 55 and over parks that don't want me there. Owners make their own rules, vote with your dollars. When I have encountered RV age questions usually they reply they don't care as long as the RV is well cared for and presentable.
Safe travels, Tom & Jen, Middle GA
2009 Coachmen Sportscoach Legend TG500 45'
2016 Jeep Rubicon Toad, Blue Ox Avail & Invisibrake