After reading most of the posts and skimming thru the rest in this thread I don't want get into the tunnel on/off debate, but do want to put in a plug for the FoodSaver (seal-A-Meal) devices. Our RV is on order and we never had a fridge before so we lived out of coolers until this point. I like to BBQ & smoke meats and the FoodSaver makes it real handy. Cook/smoke up a bunch of ribs, pork chops or what have you and after eating your share package a meal portion in the FoodSaver and seal up good. Freeze until you trip and you're good to go. Not only will the frozen food help keep everything else cold, but also saves ice.
We take out a pack of ribs, still frozen and pop'em into the mircowave (never had a fridge, but can't be without a microwave). The bag blows up like a balloon and steams the food warm. Taste like it just came off the grill. I'm a big advocate for the FoodSaver.