Practice.
When buying the first bug-out-bag, they tend to be very large. As your skills improve, the bag gets smaller.
I’m reminded often of that knife fighting movie “The Hunted” when Tommy Lee Jones heads off into the woods for a few days. Nothing but a good knife.
I used to traverse the Delaware Gap on my commute. I packed a bag in case the weather got bad out my car broke down. Radios chargers, maps, food, firestarter, even a 10-22 and a bow.
NY State Police got on me for the gun, and Pennsylvania game wardens (are far more powerful than people think) got on me for the bow (thought I was poaching). Now that I’ve learned how to make a fire even in the cold snow at night, learned Filipino knife fighting (3 years) and building snares and fishing line that bag isn’t even in my possession now.
It’s all about the scenario. Do you need to get a vehicle? 10,12,14,15,17,19 mm sockets, vice grips and a pry bar. Need to maintain caloric needs? An mre, uco candle, life straw and a mess kit. Risk injury? Forget the bandaids. Gauze, wrap, sutures and skill.
Even a gun isn’t in my “must haves” anymore. But my kabar is.
Yes. As a matter of fact I use my same BOB/GHB when I hunt elk in Northern Arizona. My BOB/GHB is built around a medium ALICE pack. The only changes I make for hunting are to carry game bags, extra knives, more water and additional cold weather clothing. I'm confident with the system I have and have used it numerous time out in the wild.
For me, the medium ALICE is the best fit for how much weight I can reasonably carry all day.