Long after Ken Burns inspired a nation to sniffle, Civil War hobbyists are reenacting America's deadliest conflict—over and over and over. Live from the ersatz killing fields of Gettysburg, our man asks: Is this any way for adults to behave?

YOSEMITE NEEDS YOU came the rumbling call. With a crisp salute, our gung-ho correspondent rushed headlong into the summer-job fantasia of weed pulling, suitcase lugging, kamikaze tourists, and underpaid underlings who cower before the stiff-brimmed silhouette of Ranger Rick. A grunt's-eye report.