I'll go ahead and answer some questions that you didn't ask.
Since you do your own butchering I think you have three choices:
1. If the temps are reasonable (and they should be during 1st rifle) then you should be able to hang the meat for at least a week.
2. You could pay a butcher to store the quarters in their refrigerator. I've found that they are about $10/day.
3. You could debone all of the meat and vacuum pack in large bags, and keep them in a cooler. This is the least desirable way to do it because you won't get to dry age the meat but it is the cheapest option for sure.
Be aware that in most states it is illegal to transport bones, heads, etc unless they are taxidermed due to CWD concerns. I've heard about game wardens in Arkansas sitting on overpasses of I-40 looking for elk heads/parts. They are looking down into eastbound pickup trucks. They can seize the head/parts and ticket you. So be careful to leave bones in CO and clean up the skull cap. By the law you would have to have the skull taxidermed in CO if you wanted a European mount.