Over this weekend we had the Jayco pulled out about 10ft and then backed-back in.
I got some 2x8s and a 1 1x6 treated boards and stacked two 2 of the 2x8s, one 5ft and one 4ft w/angle cuts, together to push it up 4" on the street side, and put a 4ft piece of the 1x6 under the curb side tires for a gain of 3" on the street side. We also put the "Wheel Stops" between the tires on both sides.
We are "much-more" level now and well within the operating limits.
Much thanks to my camp-site neighbor and his "monster truck" for the assistance. The TT feels much better now, and only jiggles when someone is using the fold out steps. Once we get to the wood-steps (as most seasonals have) I'm sure that will help too.
We may be purchasing new stabilizers (sissor-jack type).
I imagine that Jayco would be the best source for those.
My Other House Is A '02 Jayco 31FKS Designer TT