The city wants to expand the backstage area and parking and replace the aging roof and main ticket office at the facility built in 1947, the Lincoln Journal Star reported (http://bit.ly/1sUTMgg ). City Parks and Recreation Department Director Lynn Johnson said bands such as Boston and the Doobie Brothers have enjoyed performing in the three summers since big name acts returned to the venue after a 17-year break. [...] their production staffs have had a hard time getting tour buses and equipment down a single-lane gravel road to the backstage area. The Clark Enersen Partners will help draft a master plan and the city hopes to have it ready for the mayor's office and Parks and Recreation Advisory Board to approve this winter.