Our d-way is inclined as well. Back in off the street alongside of garage where it's level (though slanted away from garage). Put boards down to level side to side, Roto-Chock wheels, and put boards under landing pads and shim so pads touch at same time (just like if your leveling at a campsite). Leg farthest from garage goes down a bit more due to slant of d-way. If you have a very good slat, you may have to place blocks under legs to get level front to back. Like AP said, don't run appliances, or slides out if not level.