After a few days off, String Cheese Incident’s summer tour with RatDog picked up at Milwaukee, WI’s Marcus Amphitheatre. In addition, Keller Williams offered opening duties, inviting Bob Weir onstage for ‘Monkey and the Engineer’ and ‘Cassidy.’ During String Cheese Incident’s set, Weir, Williams and RatDog bassist Robin Sylvester also emerged for a version of Bob Dylan’s ‘Mighty Quinn.’ RatDog and String Cheese Incident’s tour will continue tonight at Kansas City, MO’s Starlight Theatre.