For moving around in a V-bottom boat, standing up; you will find your footing is a lot more stable if you put a flat, false floor in it like a lot of newer boats have. Then you aren’t dodging the ribs as you walk around. If you modify a boat, careful if you plan to eliminate the middle seat – on some old boats the seats are part of the structural integrity.
As for short or long shaft, if you are backtrolling on rough lakes, splash-shields willbeneeded with either size transom to keep you dry.
Dave