I don't think that casino staff could help and offer any more insights than anyone else.
casino staff are only working on its own and dont watch or talk to the gambler because the boss dont like it and the gambers dont also like that strangers will interview them .
I don't really think you'll need a casino worker for advice
casino workers are only workers and they can only give advice of how they work but not gambling advice because they are not a gambler . if you want gambling advice you need to seek for the real gambler for that .