I've got a Kifaru Duplex frame with a Nomad bag that I've been using for canoe trips in the BWCA. It works but gets a little tricky with trying to keep all my dry bags strapped in. Has anyone used a different bag on the frame for portaging/keeping gear dry? I was thinking it would be great to have a big dry bag that I can attach to the frame and dump my smaller bags in. Anyone have ideas or have something else they use?