My bad. I wrote a response assuming a day hunt, but rereading your post it sounds like you're overnighting it AND hauling meat. Anyway, here are my thoughts on a dayhunt:
With the weight of a quarter (I don't pull the trigger, but I've helped haul out elk and moose), I'd like to be able to get the quarters decently high on my back - higher than a normal packbag would be.
I'd go with just a frame. Ideally with a yoke system of straps. Then go through and sleeve and tape all the little rattly bits.
Bring some of these great straps:
to secure quarters to the frame.
Then hang or strap a daypack on the frame to carry your sweater, lunch, water, knives, saw, hanging rope, etc. Then you can leave the daypack at the butchering site till the last load out. And/or when you have a load on the frame, wear the daypack backwards on your chest.
For the small cuts of meat, get any beater duffle or daypack or pillow case or even a poly sandbag (strong and cheap) and then you won't have to wash the blood out of the pack bag.
I maybe still like the bare frame for overnighting. Strap on a light duffle on for your overnight kit then you don't have your packbag weight on each trip out and you can avoid getting the packbag all bloody.