Bikers - more than 500 in all - get set for Tucker's Toy Run Saturday, which started at Tri-Boro Sportsmen Club, Northampton, continued to St. Luke's Hospital, Fountain Hill, and finished back at Tri-Boro. During this sixth annual event, participants carried toys to the hospital's pediatric unit and other needy children in the Lehigh Valley. According to organizer Rick Nauman, “This is a memorial