At night… the Zoo Goes BOO!!! On Saturday Night, October 19th grab your little ghouls and goblins and trick or treat at the Dickerson Park Zoo! Little ones may score a Trick or Treat Bag (while supplies last) courtesy of Ozark Fence and will be able to visit tons of local businesses handing out candy! This family-friendly, all ages event is only $5! Admission is also required for Friends of the Zoo members. 2 and under are free.