My driveway is badly sloped as well. I store the camper on saw horses. The front lower sawhorse has a 4 x 4 on it to raise the front end 3-1/2 inches. It is still low about an inch or more. So, my slope is about 5 inches over 7 feet in length.
Jacking up is no problem. Just jack up the front more than the rear and keep it level.
The creepie part is lowering it onto the truck. The truck bed follows the slope of the driveway, and the camper does also as it lowers onto the bed. The front jacks really get torqued. Scary stuff. Worse, the camper moves forwward (downhill) as it lowers in to the bed. I actually stop a couple of inches short when I back the truck under the camper so the camper can end up snugged against the truck bed.
The key question is............ How sloped is your driveway? Do the math. Mine is about 7 to 8 inches over 10 feet. Any more is probably a problem.
Edited by whizbang, 14 September 2013 - 04:23 AM.