Mountainsmith Modular Haulers I have these in 3 and 4 module version.  Common size so even central market cooler bags fit.  Use 3 for food, 4 for kids clothes with a warm and cold bag for each kid. Camping And Hiking, Camping Trip List, Camping Guide, Camping Essentials, Camping With Kids, Camping Experience, Tent Camping, Camping Gear, Backpacking