my "big duffle bag" is a Craftsman plastic wheeled tool chest with collapsible handle...somewhat waterproof....place to sit if necessary...upper tray for small, high value items... interior space....bungee for 5 gal bucket of freeze dried entrees and Sawyer filter, and sleeping bag... stop at the gun safe for some cash and a blaster, grab the meds...the GHB permanently resides in the Explorer...copies of papers on a thumb drive...

hope it's never needed