Your nose is your best guide...
If the meat is still cool--doesn't have to be COLD, just barely cool (even normal room temperature)--and ESPECIALLY still smells ok, it IS ok. I've trusted my nose all my life...no one has ever gotten sick from any food I've ever cooked for 'em yet. Coolers insulate pretty well..a quilt or blanket over 'em insulates 'em even better. Cold falls, so put meat in the bottom of a cooler...put frozen water jugs, frozen juice cartons etc on top of it. "Blue Ice" packs take up little room and also help to keep things cold under 'em. The only time I ever had any problem was when I put sausage patties on top in a cooler that was in my cockpit for 2 days...I knew the instant I opened THAT package I wasn't gonna cook 'em! The small electric coolers are a good idea...but the same applies to them that applies to any fridge: the less often they're opened, the more efficient they are at keeping things cool. So separating your drinks--anything that you're likely to go for often--from your food that you'll only go after at meal time is just as important.
If the meat is still cool--doesn't have to be COLD, just barely cool (even normal room temperature)--and ESPECIALLY still smells ok, it IS ok. I've trusted my nose all my life...no one has ever gotten sick from any food I've ever cooked for 'em yet. Coolers insulate pretty well..a quilt or blanket over 'em insulates 'em even better. Cold falls, so put meat in the bottom of a cooler...put frozen water jugs, frozen juice cartons etc on top of it. "Blue Ice" packs take up little room and also help to keep things cold under 'em. The only time I ever had any problem was when I put sausage patties on top in a cooler that was in my cockpit for 2 days...I knew the instant I opened THAT package I wasn't gonna cook 'em! The small electric coolers are a good idea...but the same applies to them that applies to any fridge: the less often they're opened, the more efficient they are at keeping things cool. So separating your drinks--anything that you're likely to go for often--from your food that you'll only go after at meal time is just as important.