Picked up these hydraulic “Hijacker” camper jacks off Craigslist recently ($60 used, not bad!). I needed a way to lift the camper off the truck to finish up some of the welding on the bottom, and to paint the camper. They work great. Thought about getting some tripod jacks like these but decided to go with something more permanent.
I think I will also use the jacks to level and stabilize the camper when it’s parked. They’re easily removable so they can be stowed while driving.