I imagine that you will be hunting in unit 23. You are required to keep the meat on the 4 quarters and ribs in that area. You also have to transport all the meat out to where it will be transported out of the field, before the antlers, except you can pack the antlers with the last load of meat. In my experience you are looking at 150-200 pounds per animal, roughly. The books up here say a caribou goes 500 pounds on the hoof...I don't know if I've ever seen one that big but I generally get 120+ pounds of boned-out meat or more per bull. Maybe I should shoot bigger bulls!
I would make sure you move the meat a fair distance from the gut pile, even if you can't get it all the way to camp. Bears will go to the bloody gut-piles first. You can take the antlers to the meat stash then too. Just be sure to leave it in a spot that you can see from a distance when you return for it, unless you like surprises! I loosely cover the meat with a tarp to keep birds or rain off of it but not so tight that it can't get air around it.
It should be cool enough for you then. Have a great hunt!