Advice on hunting packs?

Hi all, I've always made do with hiking packs but would like to purchase a dedicated hunting pack. I have a pro deal with Mystery Ranch so will probably buy through them unless there are major red flags about the brand from people here.

I typically hunt in alpine and sub-alpine conditions, carrying gear for basecamp and then day hikes. Weather is cool/cold and dry. Pack needs to be able to carry up to 100lbs.