AMBLER, Pa. — In the aftermath of destruction, reality can set in. “We lost so much,” said Kathleen Salisbury, director of the Ambler Arboretum. Sometimes, though, there’s a chance to gain much more.

A Mendocino National Forest campground destroyed in a major wildfire has reopened Friday, officials said. Hammerhorn Campground, in unincorporated northeastern Mendocino County, was destroyed during ...