Ive browsed around some forums, and a google or two later, I think that (for the most part) RVers use presure treated wood under the tires for a side-to-side level. But most are towing, and thats "not" my situation. I read a post from a seasonal camper inquiring about the same thing and most responses were "wood". For Example(all treated wood)
Two 2x8s (one cut to 6ft., one cut to 5ft) with some 1x6s for extreme situations.
Also some are using 2x6s w/ 1x6s cut at various lengths to attain "level".
I believe, or hope to go with, the two 2x8s cut at lengths of 6ft, and 5ft., with both meeting at the end. This allows for a "step" effect while attempting to acheive "level" when backing the Jayco onto them.
I may even throw a 1x6 under the "low" side to get the tires off the ground.
This is a total gain of close to 3" on the street(driver) side. We'll see if thats enough, and I hope it is. The bubble in the side-to-side level is not visible because of the tilt to the street side. I hope to get it as close to "ball-park" as I can.
Im also considering attaching both boards together with screws so the top board wont spring up when the wheels attempt to climb it.
Get'n this done on Saturday, so wish me luck, and I'll try to post results via my iPhone from the camp site.
My Other House Is A '02 Jayco 31FKS Designer TT