Slanted Driveway

I have a toyota SR5 V6 pickup with the same tow capacity. I can easily back up our 17' camper - our driveway is steep, not moderate. I have to take off the WDH springs as it helps to have the rear end of the camper high, and put the truck in 4WD - but it works. You should be fine, but I wouldn't push the 6500 lb towing limit. Our unit is a 17' hybrid, and weighs about 2800 lbs, but you still know it's back there. I would guess that you'd be happy with anything up to about 3500 lbs or so. The bigger issue is leveling it at the top of the driveway if you don't have a flat spot. I don't, so I don't park it in the driveway except for using the driveway to turn around on our street, or for loading, unloading or maintenance. Even then, I use chocks, blocks and anything I can to make sure it stays put.