BRAINERD — All the summer staples are on tap for Brainerd and Baxter’s 250th Fourth of July celebration. Starting on Sunday, June 28, Arts in the Park kicks off festivities from 10 a.m. to 4 p.m. in north Brainerd’s Gregory Park. A multitude of artists will sell their goods alongside food vendors and a smattering of nonprofits spreading their messages in the community corner. The classic car show is back, too, and anyone interested in showcasing…