Engel DeepBlue Coolers are built to hold ice for up to 8 to 10 days. Almost as good as the Extreme Cold Series. Engel coolers are cmparable to the Canyon coolers in every respect. Canyon is more affordable though.
Ambers idea of swimming in the lake! magicswim- an inflatable pool for boating (tiny holes in the bottom so lake/ocean water fills the pool without the fish and stuff) Perfect because all of the "stuff" is gross.