By the brochure, I see the leveling jacks were an option for your coach. Does it have them? As "ThePowells" said, you can block under the wheels and jacks to gain some altitude.
We have three sets of Lynx Levelers (at 10 blocks each), plus four caps and two chocks. I believe the Lynx Levelers can be stacked up to five inches high; I could not find the instruction sheet to confirm that. I have stacked them that high, though, and tend to "follow the instructions," so I suspect that five inches is the manufacturer's guidance.
I also put jack pads under the blocks when on soft ground. That gets me another inch in height.
Depending on the rear overhang of your coach, and the campground rules, sometimes it is possible to remove a few inches from under the high-end tires and solve some of the un-level issue that way.
If things are too far out of level, I'll usually request a different site.
2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis)
2009 Honda Fit Sport