Green, that sounds very cool -- sort of an "RV in a bag!" How long does it take to set up and take down all that stuff?
I am sure, by the way, that you could rig up a shower, complete with hot water -- I am pretty sure that Cabela's has a portable unit.
Do you bring a cassette toilet?
And to get back to the OP's question, a full size cargo trailer might be somewhat cumbersome, but I have seen small expedition trailers that can go anywhere that the tow vehicle can go -- high clearance, low center of gravity, very rugged.