How much is "quite a grade"? As Pat said, should be doable. I would suggest getting a PAIR of Rotochoks to lock the wheels AFTER you place a chock of suitable size in front of the both wheels, and let the truck/trailer roll into the chocks. Be sure the trailer can't roll forward even a little bit before lifting off the hitch. Some hitches can be hard to unlatch if the trailer is pushing into or pulling back from the tow vehicle.
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired