I grew up in CO but spent a lot of time on the east coast. I went home hunting as often as I could and I hauled a lot of deer/elk and antelope back east. I got some good coolers and boned the meat. Put 5 or 6 lbs of dry ice in the coolers and seal them good including putting duct tape around the lid seam. Meat will keep 3 or 4 days like this. if you'll be longer you may need to augment the dry ice with some regular ice and keep the cooler sealed.
I never had my game processed since I do all that myself. never lost an ounce of game meat either due to spoiling. Keep it chilled and as dry as possible and get home without stopping at the casino etc...