I was recommended the muskeg 5000 also, would the meat shelf be large enough for moose quarters?
I'm local to Kifaru, so my default answer is to call and talk to Frank, Dayna, or one of the other folks there; they can set you straight on the minute details between bags and frames, but keep in mind when it comes to pocket and zipper layout everyone wants something different.
Here's a few things to remember...
- The new (er) Lite and UltraLite frames have a stiffener (arrow shaft in a sleeve) that runs perpendicular to the main stays and helps keeps the frame from barreling around loads. I've only noticed barreling on certain heavy loads with my tactical frame that does not have the stiffener. There are a few aftermarket companies that can add a similar stiffener to a Tactical frame (or any other older hunting frame).
- If it has a meat shelf, the main limit to what you carry on said shelf will be the length of the compression straps that you use, shortly followed by the volume of gear in your bag. The different loading options on the meat shelf come into play with the different frames; the Tactical has 2 heights for attaching the meat shelf while the Lite and Ultralite only have the lower attachment point. Notably, Aron (and plenty of other folks) doesn't use a meat shelf, he just finds a way to snake things into the bag. Probably not happening with a bone-in moose quarter.
- X-Pac is a more waterproof fabric than the DWR treated Cordura. Depending on where you hunt, that might matter to you. With X-Pac, you're limited to just the Muskeg line of bag layouts. A drybag (or pullouts) in a cordura bag + a waterproof pack cover can keep your stuff dry too; but has a higher weight & volume in return for more bag layouts.
- Remember is that only one of your loads back has to have the bag attached to the frame. A Grab-It (or Sherman, cargo net, 1/4 panel, etc...) and 3 or 4 compression straps will be lighter and easier to rig for any return trips than messing with the meat shelf and bag again. If the hike is long enough to risk an overnight, throw a guide lid on with what you need to bivy.
- You can use a smaller bag with a meat shelf to create more space for gear while still having a small bag for day trips and short multi-day hunting; just put your heaviest stuff in a dry bag and on the meat shelf for your hike in, ditching said gear and re-rigging the pack to hunt once you set camp.
- Pack volume needs to be driven by what you're putting inside of it. When I started backpack hunting, I had a lot of gear that was heavier and took up more space than the stuff I have currently. Now I can do 6+ days out of a Woodsman with a guide lid and a pair of medium pockets, starting out that was 3 days with a Woodsman, guide lid, and 4 pockets.