It depends on when/what you intend to carry. I really am happy with the Badlands Reactor pack. Less than $100, it has the fuzzy facing on the outside and came with a water bladder. That said, I long have gotten rid of the bladder (it leaked), but am super happy with the pack. It's only 1000 cubic inches, but has straps on the bottom to carry raingear and bulkier items. Once in the tree, it's small and inconspicuous. Initially, I was worried that it may be too small, but has not been the case. Perfect for MY treestand hunts.
I'd go with a badlands, can't beat their warranty, and design details. The more I use a fanny pack the more I find I like it, the bigger the pack the more stuff I'd take with me only to sit in the pack
I run a Tenzing 1200 (or something like that) for my 2-3 hour sits. It's a little 1200ci pack that holds my field dressing supplies and such, and an extra jacket or whatever if I need it.
If I have my daughter with me and need to haul a pile of stuff with me (keeping kids warm, fed, and comfortable makes I get loaded down like a mule, lol), I run an Eberlestock X2, and love it. It's bigger than I'd want for a 2 or 3 hour sit on my own, though.
I had a small badlands pack (forget the model) and loved the fit and comfort, but it was made to just haul a hydro bladder for hiking, I guess, and I used it for gear. It was ONE big pouch and I didn't like that I didn't have any pockets/divisions to keep stuff separated and organized. So I went to the Tenzing....but I liked the fit and weight handling of that little Badlands.
Badlands , I have 2. The only drawback on both is the outermost pocket on the front is very thin and narrow. You can hardly get your hand in it. I use it for licenses, zip ties and thin hardly used items. Love the bottom "bedroll straps". Mine have several cross straps ,rain cover stashed in the bottom, pocket for waist belt. Bigger one has way too many little zippered mesh pockets. The other is much smaller and has NONE. That surprised me. So I cut one out of the bigger pack and sewed it in the smaller one. I use the smaller one for turkey hunts. Bigger one for deer
I started with cheap Gander Mountain ones which served well, I moved to Badlands because I found one on sale. I recently purchased a Tenzing.. Friday I order the sitka tool bucket. Long story short, the badlands was great, mine has a million pockets on it and I couldn't keep track of everything. I ordered the tenzing because of the functionality and have no problems with it. Friday I saw someone that had a sitka tool bucket and I fell in love with the design. It is pricey but I think it will cover all my needs, especially when trying to haul filming gear in and out of the woods.
I have a couple packs from Eberlestock that I like a lot. The Badlands, Eberlestock, Kuiu type packs are made to carry heavy loads in the event you cape an animal in the field and carry the meat out with the pack. They are great but may be overkill just to throw a lunch in for your hike to your stand. There's no harm in having a pack that is too good though.