Had the cargo panel originally with the moose hunt in mind - it works perfectly for hauling but all the straps and extra pockets for day hunt gear got old real fast.
I use an EMRII bag on a duplex frame. It's about the biggest bag available from Kifaru with lots of additional pouches and pockets for smaller gear you can access fairly quick. I've used it on quite a few sheep, mtn goat, and elk hunts where I know I'll have lots of bulk (capes, meat, camp, etc). I've amazed myself on how much stuff I can load in it....and still stand upright! The largest, boned, hindquarter of an elk easily fits inside the bag. One nice thing about having meat inside a bag is it is secure and doesn't catch on brush (willows in moose country). Also, it is super stable when cinched down. Many framed packs have a gap between your back and the load which can be dangerous if the load shifts when on sidehills or crossing down logs/rock/etc. Also, having a load tight against your back prevents a lot of twisting of torquing of weight on your lower back and shoulders.
If I was going to buy one frame for hauling hefty loads I'd likely get the longest pack frame that Kifaru offers. That way the load lifters are put to best use and you have a longer platform for more bulk. I wouldn't even consider a meat frame that doesn't have some sort of load lifters...they work that well! One thing you will likely notice when you first put on a Kifaru frame is how comfortable they are. You can't say that same thing about other frames! Take a look at Kifaru frame reviews and you likely won't find any complaints...and mostly rave reviews!
The rears on a bull moose fit in the bag of the AMR, it wasn't fun getting them in the bag however. Would rather have used a cargo panel or the Nomad.I could barley get a bone in hind quarter off my elk inside my Mountain Warrior bag this last fall. I'm guessing a moose leg might not fit but no experience. We're planning a trip for 2018/2019 and I have been thinking about this as well, so far my plan is to pick up a nomad and use that but will be watching for other ideas.
cnelk, which direction did you split the rear quarters and how did you do it? I was not aware you could split them. thanks.