Last year, while on vacation, I found these awesome bright orange swimmer's cases designed to keep personal belongings dry, but are perfectly sized to hold an altoids tin plus a few other items around the edges. Still playing around with that (and wishing I had bought more than just one of them ).

As for in the pack, I am taking notes and plan to try out most of the options mentioned when the time comes. I figure ziploc freezer bags will be the way to go as I hope that between the pack rain cover and my own poncho that things will remain relatively dry. I hope I come out with at least a dry pair of socks anyway. Hmmm ... I sense some testing in the garden tub in our bathroom coming on. Great topic frisket.