It is a non issue. Campsites are relatively flat so the load is supported equally on all four legs. We lower the camper so that the bottom step is about 10" above the ground. The camper has no sway at that height. I installed wobl-stoppers but in reality they were not needed.
A camper is not going to tip over. The majority of the weight is below the level of the windows where there are the holding tanks, fridge, stove, etc., and little is in the upper cabinets and the cabover section has little weight even when we are up there sleeping. We do have the most forward part of the camper about 4 inches higher than the very rear of the camper but I doubt that it is critical to do so.
Next time you take the camper off, lower it within 2' of the ground and then try to push against the sides and see if there is any movement. Go inside and do the same.
