Pack the camper and the kids and head to Blue Hill Fairgrounds next weekend for the seventh annual Glorybound Gospel Jubilee. What is believed to be the largest Southern gospel sing in Maine will feature four days of music, starting at 7 p.m. Thursday, June 23, and running through Sunday, June 26. Sponsored by Hampden-based Glorybound Ministries, the festival features a long list of performers, including the Wilburns from Carthage, Tenn., Mark Bishop of Irvine, Ky., and the Dixie Melody Boys from Kingston, N.C. Tickets are sold at the gate for $15, with children under 12 in free. Camping is free, but bring jackets and lawn chairs. Call 862-4258 or send e-mail to glorybnd@aol.com.