Hey I like that!
Are you going to incorporate louvered vents somewhere in the galley, so the hatch can be closed at night?
I'd be more leary of bears than those little masked bandits... Bears can really get with the program! Your wonderful handcrafted trailer would just be something in the way that would need to be discarded to get to the food.
Just curious here... I know that a lighter tongue weight is a big objective for you but, if it wasn't... did you have room to move the AC unit a tad forward, so a multi vent similar to Cary's could be incorporated just in front of the hatch hinge?