I doubt if I could survive on the run. Food, water, and shelter etc is not just stuff it is necessary to survive. If I can’t bug in, I’m probably doomed anyway, so might as well fight for it.
If you live in the right area, being “bunkered in” with the right equipment, supplies, and a decent neighbor-network, is exactly the right thing to do.
I live in a sparsely populated area with several like-minded neighbors. When the SHTF, a couple of large black-powder charges can drop bridges making our area extremely difficult to access.
A mech infantry battalion MIGHT be able to dislodge us, but nothing short of that will be able to even hurt us much.
There is a high likelihood that other homes/abodes will be attacked before your place, which should be a good heads-up that trouble is on your doorstep, and a great to make friends!!
the problem with running is ambush and what if not everyone can get out?