The bus ride from Bakersfield to Barstow is pretty cool, as you can view a substantial amount of the Tehachapi Loop from Highway 58.
From Barstow to Las Vegas, there are many miles of heavy road construction projects. Expect delays, especially on the weekends.
The Amtrak Thruway bus stops at the Greyhound station, just south of the Union Plaza Hotel in downtown Las Vegas.
Upon returning for your departure to Bakersfield, the Amtrak Thruway bus will depart from door number 6.
This ain't like riding the Hound. This is a dedicated Amtrak Thruway bus for rail passengers just like you. It is operated by Antelope, a former Coach USA company that was recently purchased by the Kohlberg Group. They usually assign brand new Van Hool C2045s to this service.