Local law enforcement agencies are urging parents, neighborhoods and motorists to be cautious of trick-or-treaters this Halloween. Cpl. Joe Britte, Gainesville Police Department public information officer, said extra patrols will be out and about this evening but they don’t expect to see much trouble, except for the occasional Halloween prank. Sgt. Stephen Wilbanks, public information officer for the Hall County Sheriff’s Office, said deputies will be patrolling neighborhoods and residential areas in the county to help control traffic.