I have a steep driveway with a big hump in the middle. When backing in from the alley, I find it necessary to loosen the load leveling hitch bars by one link. For my situation, it gives enough lift for the hitch to not bottom out, and enough flex for the hitch to back around a right angle from the alley. It's no fun after a long drive home, but well worth being able to store the trailer at home.
I would suggest experimenting backing in with some patience, blocks of wood and understaning friends / family to help. Leave the garage door off until you back the trailer in to the garage a few times, that will tell you what kind of door to pursue. One more suggestion, use 4 low on the transfer case if available. That allows me to creap up the driveway an inch at a time when necessary.