Parking camper on sloped driveway

I have a 4 degree front to back slope but not much side slope. It is not fun trying to both load and unload as it puts your jacks & feet into a bind and the straps that fasten the rear jacks to the bumper started to bend. I built a set of ramps out of pressure treated wood 9" tall that I drive up onto which has made both unloading (backing front tires onto ramps) and just parking in the driveway so that we can use the camper and run the refrigerator (driving rear wheels onto ramps) so much easier and less stressful. The key is using the truck's 4x4 compound low for controlling the travel speed onto the ramps. Also, when the camper is up in the air and off the truck, make discernible marks with a felt pen on the inner jack legs so you will know that you are at the correct height when you raise the camper to reload it. I would definitely not want a cross slope or I would build a platform to eliminate it.