On the locked up brake check the rubber break line the swell up with age and won't let the fluid go back to the master cylinder there by locking up the brake. I blew two front tires because of this.
On my Wildcat the bedroom slide would creep out, I found solenoid valve top had worked loose, don't know if that is the proper term, mine was located in the lines from the pump, the top is black plastic and I tighten them, clockwise, by hand. Every once in a while it will creep out again while in storage, I run it in all the way then tighten up the valve. When it first happened I emailed Lippert and this is what the tech told me to do.