I have been through a few.
The last 4 years I have used an Eberlestock J-34. Construction of this pack is excellent, love the scabbard and the ability for the pack to expand to carry meat. I dont like the pack in day pack / compressed mode, it has hardly any capacity and the expansion zipper wants to unzip anytime you want to put stuff in the main compartment. The pack is a tad heavy also but this was expected given the type of pack that it is. Also, do not like the bow bucket attachment, that is a POS.
For shed hunting I use a Hornhunter Mainbeam. The design of this pack for this application is excellent, especially for deer antlers.It will handle elk antlers in a pinch as well. Drawbacks of this pack (and the other hornhunter products I have owned), is materials and workmanship. They use cheap buckles, and other hardware. After 5 years, the pack itself is holding up ok, just many the clips and buckles have had to been replaced. One of the zippers is bad also.
This year I am giving the KUIU Icon Pro a run. Initial impression is I like the design of the pack and that it is super light. I would sacrifice some weight for some more waterproofness.