In the spirit of a cross-bike, which can ride anything like a road; or a snow-bike, which can ride anything like a trail; how about a 'river-tour' kayak, which can paddle anything like water? It's the Pyranha Fusion RT.
Sure, it's a shade slower than a sea-kayak and carries less, but is easier to roll and manoeuvre, and cheaper and shorter to get on your car or store. Yes, it is not nimble enough for class 5 water... but I'm a father now, eh? Not as good for surfing as a board, no shit, and there's no warm water in Canada, either. How does it track? Retractable skeg!