I'm going to build a rough road trailer to tow behind my Jeep. My dilemma is that it needs to be able to hold my motorcycle every once in a while which requires 8 foot of space. Should I build the shorter easier to handle 4x6 box with 2 foot sides and just put the tailgate down when I need to carry the bike or build a 4x8 box with the same height sides and be able to leave the gate up? Is the extra 2' of length and ~1' of wheelbase really that big a deal if the trailer will only see rough 4wd roads and no actual trails?