Residents and visitors during the 49th Annual Superclean Knoxville Nationals should keep their coolers and valuables locked inside their campers and trailers during the races. That’s according to Marion County Sheriff Ron Goemaat. Goemaat says although there are deputies patrolling the race grounds, people are still advised to take preventative measures to deter theft. Goemaat also says to have fun, but to do so responsibly and using common sense.