When I finish building my 18+ foot Greenland kayak (appropriate for my size), I'll want to put flotation at both ends. Since the only access point into the boat is the cockpit, and its a long reach to the bow and stern, I'm looking for an alternative to commercial float bags that will be annoying to put in and take out.

I'd like something a bit more permanent that I can push in and leave, without worrying about deflation... closed cell foam comes to mind, but I don't know if that will work, and it can be expensive.

And bulkheads just don't seem appropriate or workable.

Anyone have any ideas? Thanks!

cjk