I'd bet the 3500 will be fine. As pointed out above, lots will depend on the size of your gear and how many "lightweight" items you take and how many "non-essentials" you leave at home. The problem might become what to do when/if, (but hopefully "when") you get something down and have meat to pack out....
I've done 5+ days in a Kuiu Icon Pro 3200 - even with a few non-essential items. Video here:Bag Dump: 5-day Backcountry Elk Archery Hunt Gear in a Kuiu Icon Pro 3200 - YouTube
Also good to mention that usually strapping stuff to the outside of your pack sucks,
Really struggling with going 3500 vs 5500. Mainly day hunts with some 2-3 day spike camps. I have a Kelty 5500 and the thing is massive. Can't imagine needing that much space but everyone says go 5500. Thoughts?
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These things are gonna come down to personal preference. Some prefer a smaller bag so they don't 'overpack' or so they feel a little slicker cruising through the backcountry. In reality, if you have a bigger pack, no one's forcing you fill it up - just need to exercise self-control and ignore the GIF. I, as well as many other would rather have a pack that's too big than too small. With compression straps, the large packs suck up to the size of the smaller packs, so they're not at all bulkier with the same load out inside. The 3500/5500 Exo for instance, when compressed side by side, it's hard to even tell the difference between them, and the weight penalty is mere ounces. The other thing is, do you prefer to use the load shelf or put meat in the bag? Buy a bag planning for the pack-out, not the pack-in. Another option is if you're purchasing the pack new, why not order both bags, give them a test-run and return the one that doesn't fit your style.
Thanks for this. I have the EXO K2 frame and so those are the two bags I'm considering. I guess my biggest thing is I don't want gear flopping around loose inside it. I will certainly be using the meat shelf, so that's not really a concern. I'm liking the idea of those Kifaru zipper bags to divide my stuff in an organized manner, so that will help. You're right though, it is pretty easy just to compress the pack. Just trying to cut weight and also I can get used 3500 bags and save some cash. Harder to find the 5500's, which frankly should be a sign.
If I need some extra capacity out of my 3500 Ill put my sleeping bag on the outside of my pack attached to the bottom. Never notice its there and it frees up a lot of room. If you still need more room I'd start evaluating what in your pack.