The Reno Hilton is my favorite for that city. The casino is indeed large and spread out, with no sense of claustrophobia one easily gets in many casinos.
The rooms facing the airport are without a doubt among the best for observing airport activity. Any mention of the Reno Hilton always reminds me of one truly scary experience I had watching when runway 34 was in use - landings and take-offs to the north. That put the departure end of the runway just below my window. A NW 727 made its take-off roll toward me - it just kept coming and coming and coming. The aircraft could not have been more than 200 feet from the end of the runway when the nosewheel finally came up, and the main gear lifted off so close to the end of the runway that the wheels nearly hit the approach lights. For a couple of seconds, I was convinced they were not going to make it.