Blah blah blah about weight on the rear axle. If your only 2-3 inches out and need an additional inch on the clearance point between your truck and rv, which I would also recommend, raise it the inch you need and enjoy your Rving!! Nearly all RVs have an equalizer on the springs at the connection point between the front and rear axle for just that reason....to equalize the weight between axles. Now in an extreme situation where your loaded heavy in the back of your rv such as a fully loaded toy hauler then you might have an issue but on a 5ver camper only you shouldn't have any problems. Yes Ideally it would be nice to have one set level but with truck heights of today sometimes its pretty hard to do. Been towing about 5" out of level for several years with a toy hauler loaded with 2 Harleys, frig always works and I've not had any issues to date!