Coincidentally I picked up a Dr. Du More's on my last trip to the store :) I did cut a bit off the end with a pair of wire cutters. In the recent past (only been backpacking about a yr and a half)I've used the Wisp's, found them ok for an overnight, but then switched to a child's tbrush, and now will give the DDM a try. I like having a full size brush, which the first two don't have, and I completely agree that with any, floss is essential. I use baking soda kept in a tiny craft ziplock.
edited for spelling... it's baking soda,not backing soda :)