The H3 comes with a 5 cylinder engine, and its only rated to tow 4500 lbs. Its AWD all the time, and has a "low" speed transfer case setting, but I can't imagine that this situation could work well in the long run. I've driven an H3, and IMHO they have a tough time make the front end out accelerate the back end (underpowered).
Remember when you tried do to your first brake/torque burnout in you Mom's V6 Cutlass, and you couldn't get even one tire to brake free? Remember how the motor just sat there and groaned? I imagine the same fate for the H3, and being the ramp is wet as another boat just pulled out right before, the H3 groaning all the way down to the drink.
I was optimistic in my original post. With a little more research--nope, its not going to work.