Minnesota casinos begin to reopen with safeguards in place Mary Lynn Smith, Minneapolis Star-Tribune · May 26, 2020 at 2:32 am Lady luck isn’t the only thing guests will need to enter Mystic Lake Casino when it reopens Tuesday. They will have their temperature taken and need to wear a face mask. And the numbers allowed inside Mystic Lake, one of the three largest casinos in the state, will be kept to about half the normal capacity. As sovereign nations, the Indian tribes that operate Minnesota casinos get to set their own timelines and rules for reopening, unlike restaurants and bars that must follow the state’s orders limiting them to patio dining when they reopen June 1.