Anoka County 4-H is holding a sale of gently-used or new prom/formal dresses and accessories,Friday, March 4, 6-9 p.m., and Saturday, March 5, 9 a.m.-2 p.m., at the Bunker Hills Activities Center, 550 Bunker Lake Blvd. NW, in Andover. More than 1,000 garments of all sizes and colors will be sold for $30 and less. Cash and check sales only. All proceeds will support Anoka County 4-H Youth Leadership programs, scholarships, and community service projects. Dress donations will be accepted…