A 14' port-a-boat with a 10hp 2 stroke might do it. Look here :
www.porta-bote.com Also, search rec.boats.cruising archives for
port-a-boat info. There was a port-a-boat thread here awhile back.
I was wondering if anyone had any
input for what they liked for a planing dingy which could reasonably
plane 4 people (assume two couples, maybe around 700 lbs), but still be
light weight and plane well.