I believe casinos take a dim view to any communication devices near gaming tables, so I'd avoid those specific situations for any misunderstandings and be discrete any other times should there be attracted attention for mere possession of any such device
What he said.
I've lived in NV since 1974. Video surveillance is everywhere and using a radio (or even a cellphone) around active pit games (Craps, 21, poker etc.) or the Sports Book may earn you a chat with Casino Security, especially in the larger clubs. They have the right to ask you to leave the premises and could even get LE involved if they suspect any illegal activity, sooooo: You're better off doing all your scanning (there's all
kinds of it in Laughlin!) and comm activities anywhere other than a casino. Harrah's has a beach area on the river; as a hotel guest you can
sit at a table under an umbrella with a drink, the RR NV/AZ database and freq hunt to your heart's content. There's a lot going on in Bullhead City
as well so bring a couple extra batteries and enjoy your stay in Nevada!