Check out Tom Yost's site as he shows how to build float bags. I extended the tubes to the cockpit area and put the valves there to make for easy access. The valves are available at NRS.

Don

: After reading the first two responses (and many things for those!), I'm
: confirming that yes... its a SOF boat I'm building. And I hadn't
: considered that a semi-permanent float device would make air drying a
: problem. Excellent point.

: A haul system for moving inflatable bags in and out is starting to sound good
: to me. No skin on the boat yet, so I'm not too late for that detail.

: cjk