I have to take a cross country trip next week and I am thinking about what I should take in a small bag for "just in case". I won't have much room so this has to be a small bag, not a backpack. Starting with a Glock 19, couple of mags, box or two of ammo, SOG Seal Pup knife, Sawyer water filter, couple of lighters, some paracord . . . What else? This has to be low profile (think Greyman). Opinions please, fire away!