I enter the BoS bunker and everything is fine. But...right as I enter the cutscene part it says everybody leaves blah blah blah...and after the loading screen is just a black screen and I can't talk to people in party dashboard or anything but turn off the console. I have cleared the cache, redownloaded the dlc loaded an old save but nothing works.

Please make sure you have the latest title update installed for Fallout: New Vegas when attempting to play Dead Money. To check to see that you have the update, go to the Title Screen>Settings>Display. In the bottom left corner, you should see 1.2.0.315

Do you have the right title update?

After entering the bunker and being gassed, my game freezes up

We've discovered in the sequence where your player enters the bunker and gets gassed, having specific quest items equipped (Loyal's Detonator, Michaelangelo's Camera, Motor Runner's Helmet, Boone's Beret) can cause a freeze to occur. We're looking into this issue, but as a workaround, make sure when you start this sequence in Dead Money, do not have these quest items equipped.

As we have more information to share, we'll let you know.