A yeti is the best way to go we had two on our trip to the snowball this year one out back (thank you trey) and one in the cab. a hopper they just came out with them which is great because you can access it while driving and it holds ice just like its big brother it lasted the hole trip treys buddy actually gave me the idea for the rack I forget his name of course he had a white truck with loco mocos on it think Stewart I think was his name great guy if I had a frig in he cab with all my wife's shit I would never be able to access it. Jm2c Frig is a cool idea though