SHAWN BRACKBILL THE WAR ON DRUGS The XPoNential Music Festival — which took place in July for many years, went virtual in 2020 because of the pandemic, and returned in September 2021 — will stay in September this year, taking place Sept. 16-18 at the Waterfront Music Pavilion (formerly the BB&T Music Pavilion) and Wiggins Park in Camden. Pavilion performers will include The War on Drugs, Patti Smith and Her Band and Geese on Sept. 16; and Nathaniel Rateliff & the Night Sweats, The Revivalists and Snacktime on Sept. 17. The performers at Wiggins Park will be: Sept. 16: Taj Mahal, Samantha Fish,…