O C I E T Y Busted! Drug dealers are planting pot farms all over our national parks, and the Park Service is struggling to root them out. TIME goes on a raid By MARGOT ROOSEVELT I AUBURN, CALIF. TODD BIGELOW/AURORA FOR TIME Going In: At dawn, Rangers search for a marijuana farm in Tahoe National Forest Sunday, Jul. 27, 2003 A blue-gray dawn tickles the tops of the ponderosa pines at the Sugar Pine Recreation Area in California's Tahoe National Forest. Campers slumber in lakeside tents; bikers have yet to hit the trails. But all is not quiet on...