The eastern boundary of the Louisiana purchase was the Mississippi River, from its source to the 31st parallel, though the source of the Mississippi was, at the time, unknown. The eastern boundary below the 31st parallel was unclear.
An A-frame pool ladder is a great above ground pool ladder designed for stability and safety that is perfect for above ground swimming pools Pool owners with small children can provide an extra layer of safety with the fold up mechanism or locking gate.
Make it wider. The more surface area on the water, the more stable the craft will become. If you wanted to make a craft like this more stable, the best thing to do would be to frame in an outrigger on either side (a strong arm that extends from the side of the craft) with a pontoon on the end of it.