Personal preference as said.
But for me, it's not really an available pack per se, it's a great suspension built on a small treestand. Make it pull double-duty as a pack frame.
The LW .5 or Beast stand, or similar. Great stands, but nobody commercially has really come close to nailing that suspension aspect yet. All the offerings I'm aware of are very okayish at best. Severely lacking in padding, poor fit/contours, not great adjustability. Cheap junk, not quality components.
DIY is an option to that end, I think the best option presently is the Kiui suspension. It doesn't take too much finangling to get that to work, and the components are available. I know there is a youtube or three showing how to do that. I harvested parts of an old Kelty pack I had laying around to accomplish effectively the same thing, and I absolutely love mine.
From there I just pack modular with a load sling, or even just bungee cords work just as well depending what I am rolling with (amount of crap correlates directly with temps). I have a few different fanny packs. Those integrate well with my climbing system (one-sticking).
I'm a big woods hunter and pack all my cold-weather gear in and that works great for me. I
could probably pack a deer out with it, but I've always just gone back to the truck to get my dedicated meat hauler. Early season that prospect is certainly easier. Packing out all that cold weather stuff and a deer, that would take more pack than I am willing to carry under my cicumstances.
ROS guys certainly can get away with a level of compactness and minimalism us platform guys can't. That opens up a lot of options to go very ultralight. I just can't ROS. Just doesn't work for me. Kinda wish it did, but alas.
I used to have a MR popup and a saddle platform, until I came to this realization. Us platform guys, by the time you add the weight of a saddle platform plus a frame pack, why not just do what I do and go to a small treestand. And the weakside shooting is so much simpler with more footroom. Win-wins to that degree are rare in life.
This is my setup. I defintiely should get a more breathable backpad, but other than that it has worked great for I think 4 seasons now.
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