As a fellow steep hill climber (and as fat SOB), I lean forward and kick my feet out by the rear wheels like I'm riding a crotch rocket.
I've been chastised here for my technique before, but it works. Even if you're not a lard butt like me, it might help!
Otherwise, tubes + water and drain in the fall. If that doesn't cut it, get a front weight bar fabbed up (and possibly wheelies bars if it's that fricken steep!).