Reggae-rock and punk musicians from Aberdeen, Maryland, who have opened for the likes of 311, Dirty Heads, Tribal Seeds, and Slightly Stoopid, the touring talents of Ballyhoo! headline an April 8 concert at Rock Island's RIBCO, their most recent album Shellshock boasting the participation of fellow reggae-rock artists The Elovaters, HIRIE, Iya Terra, Kyle Smith and Tropidelic, and their home-state friends of Bumpin Uglies.