Being an avid off-roader, my friends and I have done all types of vehicle repairs in campgrounds. From quick brake jobs to flushing radiators to replacing torsion bars and other suspension parts to replacing starters and alternators. We've never asked for permission (never even thought to) and never got hassled about it. We worked on a buddy's truck at a NJ State park for almost 12 hours one day doing several different things to it. A Ranger even stopped by to see how we were making out.
Me personally, I've swapped alternators, replaced a broken torsion bar and swapped off-road tires for on-road tires (several times) on my vehicle. Just the other day I replaced the window regulator and motor in our daughter's car at our seasonal campground and replaced the fuel filter in her car a week or so later.
I realize it's their campground, their rules, but I couldn't imagine a campground owner denying someone making necessary repairs to their vehicle, especially something as important as brakes.
-Michael
