Gov’t Mule performed at Westhampton Beach, NY’s Westhampton Beach Performing Arts Center last night. At the end of their show, Gov’t Mule invited out two old friends. For the final song of their second set, “32/30 Blues,” the quartet brought out harmonica player Hook Herrera (who has collaborated with the group dating back to their first show). Herrera returned during Gov’t Mule’s encore for both “The Hunter” and “Look On Yonder Wall.” Dickey Betts & Great Southern guitarist Andy Aledort also joined in on the later song.

In a recent interview with Rolling Stone, Warren Haynes discussed Gov’t Mule’s first album since 2009, which is due out in 2013. The guitarist says the band will has been recording in Connecticut and Los Angeles but that they plan to mix the album at Willie Nelson’s studio in Austin. Once again, Gordie Johnson will serve as the project’s producer.

Haynes also reveals that the new album includes tributes to Sly and the Family Stone’s 1973 album Fresh, hard-rock pioneers Free and Levon Helm. In addition, Haynes reveals that Gov’t Mule’s Halloween Jimi Hendrix tribute will focuses on covers the band has never performed live.

Gov’t Mule will perform at Boston’s Orpheum Theatre this evening.