Could always 'smoke em out!!'
There are a lot of problems with having a natural cave as a bug out location. Is there only 1 entrance/exit? is there a way to discard of trash and body waste that will not contaminate drinking water, should you get stuck in the save? How far back can you have a fire, so that the smoke won't suffocate you? All sorts of different things. I think the best kind of BOLs are ones that are (usually) man made, i.e. bomb shelters, storm cellar type things, is areas that can provide self-sustainment.
Id like to own one of those demilled nuke silos, but im sure the geoloc coords for those are still planted in some computers in some other nuke silos owned by other countries...
Those huge corrogated pipes look like they'd be decent for storage, temporary human use. Or just build your own shelter with elmers glue, legos, and old ammo cases