I've seen a few threads about a bug stoping people from being able to gain access to the strip because they need a key. Well i just finished the Talent Pool quest and i was pickpocketing some people in the Tops theatre when i noticed the Lonesome Drifter had a Vegas Gate key on him. I don't know if this key would help or not and i also don't know if he has it on him before recruiting him; but i thought it might help some people who expierenced this glitch.

Same here. I "fixed" it by pickpocketing him when he started moving towards Vegas. Seemed to do the trick.