Desert Diamond Casino -- Tucson, AZ
The Desert Diamond Casino in Tucson allows RVers and truckers to stay for free in the level paved parking lot on the south end of the property. Enter from the south entrance on Nogales Highway. They actually paid me to stay there since I got a free buffet for joining their club and won almost $5 on a slot machine. One night a truck parked next to me and ran their engine all night, and occasional trains go by on the other side of the highway sometimes sounding their horns. Verizon internet was good, as was local TV reception.