If I was in your situation I would raise the trailer beyond level and put blocks under each tire. Then lower the RV back down and level again. This allows the tires/axle to carry some of the weight from the RV.
If you're in dirt, i'd dig down on the other side, allowing the tires to drop down. I had about a 8-10" rut dug out to get our RV level in the picture in my signature below.