RE: Carrying full bodies?
I have no idea on dimensions. Pulled those pictures off of a small Canadian waterfowl site. Im sure you could make it any size you wanted and just hook up a bungy sort of deal too keep them from moving around. I think i'd make the end parts connect too each other though. I know there was a few guys that made very similar "carriers" and they were raving about them. same reason,, muddy fields.