Boo is Back Boo Entry Fee: $5 Zoo Members, $8 Non-Members. (Not included with Zoo admission) Available to Zoo Society members only! Buy your Boo tickets before you visit. (Previsit tickets will be available on the Zoo Society Web store until 5 p.m. on the Thursday before each Boo at the Zoo weekend. Click here to purchase. What’s in it for you? A Boo Trick or Treat Bag, a Boo Wristband (required for admission to all Boo at the Zoo activities).