I'm on the last part of 'I fought the law' and WANTED to side with the powder gangers. When I return to the NCRCF I make it all the way into the warden's office then Hannigan/Dawes/Eddie start shooting at me. I'm dressed as a PG and have never had any issue with the PG. I checked my status w/ the Pip-boy with the PG and it only shows a status for Goodsprings? Another glitch? Where is all the other factions?

Just a suggestion but the Powder Ganger are not worth it as allies...

Regardless, you should still be allowed to do the quest if you want to. I had this same issue and had to end up killing them.