I fast travelled from West Side to McCarran while using a stealthboy. I used it because I didn't want to lose rep with NCR from killing a ranger (deals with Contreras). No rep loss, so returning to Contreras via fast travel. Pop up outside of gate and the Crimson Caravan guys start shooting. ED-E and Boone shoot back (so they must have been shooting at me). NCR troopers start shooting too. Boone and ED-E kill them all. I was still stealthed and didn't shoot. When It is all over my character is no longer stealthed. Go into McCarran and there are no problems. Finish deal with Contreras, get nice new gun, and save. Try to sell to Contreras and still have problem I had before - freezes up when I finish transaction. So was it my traveling stealthed that caused the problem? Maybe they thought I was a Nightkin? I'd rather not have any more such encounters. Thanks.

Finally got this guy to the strip...level 30.