For kayak storage we found our answer in a tandem Sea Eagle Razorlite. Sea Eagle 393rl 1 person Inflatable Kayaks. Package Prices starting at $949 plus FREE Shipping

they use a drop stitch technology that allows 10psi, much higher than duckie type boats. It paddles almost like a hard shell and folds into a backpack that's checkable on an airplane if you're careful with the weight.

They make a nice single. The seats are ok for me, wife needs an extra pad.