I like to river camp and fish for bass in lakes and reservoirs.
If I were choosing a kayak with capacity to haul overnight camping gear and carry you at 230lbs, then it would be a sit inside type, like the Ultimate FX 15. A sit on top kayak of similar weight and length, cannot match the cargo carrying capacity of a sit inside boat. I have used a 12ft Perception Acadia with 400lb cargo capacity for overnight river camping. The challenge will be to find a boat that doesn't weight 70-80lbs. If you plan to cover long distances on open water you will want something with a lower profile and narrow beam. You will need to decide if you want speed or stability, because you usually cant have both.