>>2496144Anon, Please, really really listen to
>>2496140 .
There's a reason most seasoned outdoors people will tell you to buy the backpack last.
It may be unintuitive, but nothing is worse than a backpack that's too small or much too big that you already bought. Plan all your gear, get a estimation of how much volume that is and then you can start planning on what backpack to buy.
Also "outdoor survival/bushcraft" is a very vague term, once you know your required volume be more specific: Is weight of concern? Materials? How sturdy it is? Organization? Internal frame, external frame or no frame?
No point stressing over what backpack to get before that point, you'll just waste your time.