Taking note of the dozen or so individuals standing in tight formation behind a row of linked steel barricades Tuesday night, sources confirmed that venue security at the Fraze Pavilion had drastically overestimated the desire of concertgoers to get close to the hard-rock band Cheap Trick. Back up, everybody! Everybody get back! said one security guard to a cluster of fans approximately 30 feet away, who reportedly were showing no inclination toward advancing on the stage and who, in some cases, remained sitting on blankets. Whoa, whoa, whoa, hold up! You got a pass? Band members and pass holders only! Just get back and let us do our job! Lets not have any problems. At press time, following the encore performance of I Want You To Want Me, eight members of the Pavilions security staff had formed a protective huddle around the band and were rushing the musicians to their tour bus so that they could safely depart the venue. 