Jane,
Although I don't know whether the Bonneville Transit Station has staff there or their hours, I can tell you that it's not on Las Vegas Blvd. It's on the Southwest corner of Casino Center Blvd. at 101 E. Bonnevile Ave.
Casino Center Blvd. is the street that runs North-South (when you're on Fremont Street) between the Four Queens and Golden Nugget.
RecVPPlayer