Steve- SW Oregon is not really road hunting country, so I was after someway to mount them to get from the front door to the elk tent. I think your right, the last couple of miles from the elk tent to the point of walking your method would work great.
dj- here is a couple of pics of the arm rest/cup holder deely booper. I looked them over and do not find a label or brand name on them, and the fit the contours of the rig so well I am guessing they are stock, or were at least an option. I am sure someone on ZW would know for sure.