Extended travel to a "bug-out" location also means you will die.
I expect that the best odds for survival are to join a local armed criminal gang, whose leaders are smart enough to avoid confrontations with the police or military forces. Even then, the long-term prospects are not very good.
Bear in mind that any group believed to possess supplies of food, medicine, or other valuables will likely be considered a "criminal gang" engaged in "hoarding". All sorts of formerly legal commercial trades and payment methods are likely to be classified as "black market" crimes eligible for severe punishments.
And in return for appropriate bribes, the contemporary authorities will look the other way,
That is true.
Avoiding confrontations would be key. I see a lot of potential for turncoats turning in their former allies for beer.