I've been hauling mine around for a few years now. Have a carry rack on the back of my RV and have it a Honda 2000 and 6 gallon fuel tank all on the rack. I go out of state every year.
Bone everything out and get everything cleaned up. Put the meat in salmon bags of the proper size for the freezer, tie them up so you have a handle to pull them out after getting back home. Thaw the bags of meat out, cut, grind, wrap and all done.
Has made the meat issues of out of state hunting a lot easier. I'm gone for 4 -5 weeks. I can get a couple of mule deer into the freezer. So if there are more animals I will then put the frozen blocks of meat into coolers and keep them iced. Come mid to later November those bags in the coolers don't thaw. I you see them starting to thaw, just rotate the bags back into the freezer.