Sam Hunt will spend his summer headlining amphitheaters and similar venues on his newly announced Locked Up Tour. The 20-city trek is named after his upcoming EP, which will arrive on Friday, April 5. Beginning in Bend, Ore. on June 28, the tour will crisscross the nation before closing out with several shows in Canada. The final show is scheduled for Sept. 28 in London, Ontario. Russel Dickerson and George Birge will open the U.S. dates, while and Dalton Dover will be Hunt’s direct support in Canada. When Will Sam Hunt Release New Music?Hunt is set to release his new Locked Up EP on Friday, A…