With all the reviews, I'll have to try the fresh/frozen food plan sometime.  Since we usually go in early/mid august for at least 8 days, I'm betting frozen food won't stay that way for much more than 5 days in the August sun & heat.  Wonder if the burlap trick (wet a burlap sack routinely and the evaporation cools the contents somewhat) would help keep temps down when sitting all day in a canoe.