What is the proper tip rate for casino tournaments?

[Lovesantiques]

I was lucky/good enough to split 1st and 2nd at a small tourny at Bally's in Atlantic City recently. 20 people entered, and it ran for about 3 1/2 hours. After it ended, and we'd been paid, neither of us were sure what a proper tip was.

Is there a set percentage of the winnings? A generally accepted set amount? Does the tip amount depend on number of entrants and/or length of time the tourny lasts? The entry fees?

What about for single tables sit n goes? What is the proper tip rate there?

It was an $80 + $20 buy in, and we each got $680 - pre-tipping.

I don't want to cheat the dealers, but I don't want to overpay either.

Please advise.

Thank you.

Lee