[twindman]

Everything above for hitching. Unhitching is a little more challenging. Basically, if there is either forward or backward pressure on the hitch it is hard to unhitch. So lift the Monty up until you can wiggle the hitch (pivot it) a little. If you go too high, you are just as bad as not high enough. Also, if you can't get it to pivot move the truck forward or backward and try again. The obvious thing is if you back up slightly uphill, then you would need to pull forward since you had backward pressure on when parking. and vice versa.
Oh, and chock the wheels tightly before you start lowering the landing gear. With any kind of slope you will get pressure on the legs if you don't have the wheels locked in place. I bent mine when parked on sloping driveway one time. Eventually had to replace one leg.
Good luck.