Regarding lifting wheels off of the ground - MORryde lifted our 16,000lb coach with the 6pt LIppert levelers for two day while they removed our suspension and replaced it with IS. I also have lifted each side completely to do bearings and replace tires (always have jack stand under ‘just in case’ if I go under). We’ve also camped many times where one side is lifted off of the ground.
I’m not concerned at all about having hydraulic levelers supporting the whole weight of vehicle (have safety backup if You go under). We do have IS suspension though, might be concerned about inverting leaf spring suspensions if wheels are far enough off of ground.
