Every time I go near the abandoned Brotherhood of Steel bunker my game freezes. It started happening after I got Honest Hearts and I can't do NCR quests at camp forlorn hope because of it.

Have you got the latest patch installed?

Yes I have.

I've got a post further down this thread maybe try the steps I've posted up and see how you go. Ive ran into issues previously and found that doing the steps I've posted up have overcome the problems.