So far from what's been suggested the MR Pop-Up 18 looks like the best option.
But, all in all it looks like my Oregon Pack Works Orion in Lumbar mode (Rogue pack) is very comparable to these others. I may just stick with what I have. It's super comfortable and capable of hauling decent size loads. In lumbar mode it's 1,100 cu in and with the upper bags it's 2,500 cu in.
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What is your waist size? I have an 18, if it fits you I could ship it to you, and if you like it, I’ll give you a good deal, if not, you can send it back.
I have had some heavy loads on that pack, several whole quartered bucks, and probably 6-7 roosies, for what it is, it’s a cool pack.
the reason I don’t use it much anymore is I don’t like switching packs back and forth because I always forget something that’s in my other pack, so I use my k4 for everything… use different bags for different seasons, but for elk hunting, my pack stays exactly the same, and I bring the same stuff every day… then deer season i switch bags, and make sure everything I need is in there, then it stays for the season, etc
the pop up 18 has a small belt, but I don’t remember the waist size range on the small, but the option is there if it would work
pretty bomb proof little pack too, I have used it a bunch with very little signs of wear. For sure the most compact pack that is capable of carrying 100# a long way. I have owned a pile of packs, and it’s a cool option for what you need
a duplex lite with a Stryker xl would be awesome too, I have hunted in them a bunch too, and it would be great for your needs too