I use the same pack and find it more than adequate to deal with any gear needed for the hunt. The pack easily removes from the frame and has straps to use without the frame. I have used the frame to help pack out 7 elk in the past 3 years. The built in straps and that shelf offer great support and security for a bag of meat or a whole quarter. The orange outer shell that can be pulled over the load is a nice safety feature.
Don't draw the short straw to pack out the head and rack. It was hell getting that through the dark timber and the weight was top heavy for all 5 miles we had to pack out from 11,500 feet.