Searchers feel missing youth left resort areaPINECREST — Tuolumne County sheriff’s deputies resumed a limited search today for William Jeffrey Camp, 18, of Modesto, missing since Sunday. But they are beginning to feel that the Davis High School senior simply may have left the Pinecrest area Sunday without telling anyone.Sheriffs Lt. James Bland said that two years ago Camp left home and, after staying in Wyoming for a while, returned home,Camp, who lives at 1517 Hazel Lane, was last seen at 6 a.m. Sunday by some of a group of 85 persons he was with, mostly teen-agers, from the Grace Brethren Church in Modesto. They arrived at Camp Sylvester Friday for a weekendin the snow.Bland said searchers on skis have combed a 10-mile radius from- Camp Sylvester working from the edge of the search circle back toward the camp,