Thanks, Chris - that's an important point to note. I actually disassembled the kit when I got home, laid everything out, and noted what needed replacement or improvement. Among other things, I'm now wrapping my tape (duct and electrical) around a small credit-card-sized floss container. Wrapping it around one of the small plastic bags, as I'd previously done, didn't work well - the tape stuck to the bag, tearing it open when I removed the tape. I also finally tracked down some of the Katadyn purification tablets (finally available in CA) and will supplement the Puritabs currently in the kit (eventually replacing all of them as they near expiration).

(And Martin - loved the lean-to comment - hah!)