>>119797A 12.5' inuit would be a great choice.
1. Can be used as a casual lake kayak. Spray skirt and rolling isn't necessary and it'll just paddle nice and straight around a lake.
2. 325 pound weight limit is pretty nice. Gives room for a fat guy and his excessive gear should that ever be you.
3. Plenty of storage would be great for camping.
4. SCALABILITY and what I mean is that you can get a spray skirt and do serious kayaking in it. Just look at this fool:
https://www.youtube.com/watch?v=qs4JdtgMUWQThe cons might be the smaller cockpit, which lets you use a spray skirt, is less suited for the more casual as it makes it slightly harder to get in and out of. The 26" beam width is narrower than most recreational kayaks which have a 30" beam for added stability. That's not to say that it isn't stable though, it's fine.
Really, OP based on everything you've said. I think this would be a great choice for you.