Longtime between here and elk season. Lots of choices. If I was this far out, I’d set my $350 aside while looking for a used pack and frame. All the while saving more.
You aren’t likely going to buy a used frame and bag in that spec range for $350 from any of the big 5 makers, besides KUIU or Mystery Ranch. Problem, most people that have these packs really like them so, they are hard to come by that cheap.
I’ve never carried a Mystery Ranch hunting pack. I do and have carried a KUIU though. It’s a great system. Nothing wrong with it all. It’d do you just fine.
I prefer my Kifaru’s if forced to but, would not hesitate to Buy the KUIU or Mystery Ranch if beget restrictions saw that nessecary. I really like the whole system KUIU offers. Mid $400’s will put you in either one brand new. Mid $500 will put you in a new Kifaru frame and a nice used bag at your specs. $600 all new for them. Same prices with the seek outside and Exo brands too.
Don’t fret all this. A pack is important. But, any of these will work. I’d do as I said and by the end if February had I not found one, I’d buy new.