Hmm... Monte Carlo has a Star Wars game by their food court... I think it was Droid Hunt. If you go to the Total Rewards website they have a slot finder you can use to search for games in their casinos.
I'm pretty sure Aria has 2 machines because I played it in my last few trips. I know MGM Grand had 4 to 6 machines, but I have not been there in about a year. Don't know about Harrah's properties.
Was in Vegas in February of this year. We departed from Gate B 10 and there was a bank of the Star Wars droid hunt video slots in that area. If you are flying SW and land at the B gates you could stop and play on your way into town. Good luck. Vinegarjoe