I just installed a set of strut stabilizers on the 5th wheel and and work pretty good. I need to move the anchor point of the rear set because it is further than 18" from the rear stabilizer.
Along with the big kid LEGOs, a good electronic level(RV EZ Level) and the Jumbo Level mounted on the Pin Box. Oh, yeah I don't want to forget the DW, Nap-a-Gator, Boss, OK wife. She runs the Electronic Level on the inside.
It's only a problem with the ground is really soft and you have to readjust the level after a day or two.
Remember to follow the Manufactors instructions when levelings, mine says to level side to side first. Then do the front to back by first getting level, then lower the front down just below level. Lower the rear stabilizers, raise the front back until level. This takes some of the load off of the suspension which in turn stops alot of the wobble and shake.