Which is the largest casino in Washington state?

Washington state has many very large casinos around Seattle including Emerald Queens (2 of them), Muckleshoot, Tulalip, and Snoqualmie. The casinos are capped I think at 2000 machines. The ones mentioned above are each about that size. However, the Muckleshoot has an additional casino that is a 30 second walk from their main casino making it the largest I think in one spot if you consider them as one although they appear to operate independently (i.e. cash vouchers from one casino don't work in the other).