20/40 and 40/80 go every day. Lately the 60/120 and 75/150 haven't been running very often. More often on the weekends, but not a given. The 5/150 is also always running, and 10/150 is usually going in the evenings.
CAZ doesn't have a hotel attached, but some nearby hotels offer a "casino rate." I'm not sure how good that rate is or isn't, though.
http://www.casinoaz.com/lodging.asp has some details.