The Bulloch Blues Marching Band, combining the Portal Middle High School, Southeast Bulloch High School and Statesboro High School bands, is awaiting an invitation to perform in a Washington, D.C., parade in April, a trip that could cost more than $100,000. Or rather, the 200-member collective, countywide band isn’t waiting for anything, but is busily raising money to cover about half of that cost, with individual members or their families potentially to pay the other half. The next fundraising event will be the March-a-thon this coming Thursday, when the bands, together in spirit but rehearsing by turns at their separate schools, are pledging to practice for 12 hours straight.