The elephant in the room that everybody has been too polite to to point at: Why would you be bugging out? And would that be from a car, from a bicycle (with or without bike trailer) or on foot? Do you need to cover great distances? Or do you need to stay put?

A wilderness bug-out bag does not necessary mean ultra-light hiking equipment. It could mean a well-stocked car camping bag, but with the possibility of leaving 75% behind. The remaining 25% could then be pretty close to a UL weekend trip backpack. Or it could be something entirely different.

It all depends on the scenario and what other options you have available.