How big a Jon do I need to be stable when walking around? I've got a 14' semi-v that is fine while I'm sitting but something like walking up front to pull anchor is quite wobbly. I can stand in place just fine mut moving around is the thing that gets me. My inner ears give me problems at times. I get sea sick easy and car sick in a back seat. I weigh 220. I don't want to swim in a dark, cold, angry river. The rivers I fish are too narrow to have real waves on them. I might venture out on a 5k acre lake a bit when it's calm but the lake is maybe a mile wide and long. Mostly I want to scoot through 2' of water and find a nice hole on the river.