Good info, but it’s also going to depend on who is going to carry it.
Somewhere along the way, I read you should be able to carry a 30lb pack over 20 miles in 6.5 hours. I’m in pretty good shape - I did it, but it kicked my butt (plus who has time to train like that every day?)
Can’t see a kid or geezer doing that, especially in a high pressure Bug-Out scenario.
I took a lesson from the VC. You can pretty easily push half your body weight on a bicycle.