Since we're being allowed to bring any mundane items within reason that we wish, if you plan on any crafts or professions, I suggest you grab the masterwork kits for them. Also, not sure what we're allowed to bring alchemical wise. A few everburning torches or antitoxins would probably be useful. Everyone grab a healer's kit, maybe some tools like shovels, crowbars, etc. Yeah, LOTS of tools, blankets, and metal items like pots. It'll be awhile before we can get any metal to craft with.
Think Robinson Crusoe, only without the guns.
Also, cross your fingers that I get at least some of my magic items.