These 4000 to 6700 cubic inch dry bags are the perfect complement to your F1 Mainframe Pack, your M1 Carrier Frame Pack or your Just One.  
Use one of these bags with your F1 Mainframe or the M1 Carrier Frame to instantly convert it to the most capable ultralight, high-volume backpack in the world.  This setup can be enhanced by adding a pair of Batwing Pouches: if you're going to be hunting out of a spike camp, once you get there you can simply unzip the dry bag where you have your tent, sleeping bag, food, extra water, and anything else you want to keep in camp.  Then you can zip together the two Batwings and hunt with a lightweight daypack (1,200 ci) that has world-class meat hauling capabilities.