I like to take seasoned meat, prepped at home, and vacuum packed. Frozen and packed for trip works great (Polar Bear Cooler). I do this not only to assure quality meat, but the vac-packed assures the freezer/cooler remains clean and if you forget to thaw, vac-pack tossed in bucket of sea water takes care of that in short order. Then ready to place on the grill. Also avoids having to prepare food in the galley, with clean up.