Free Halloween Event at Bass Pro Shops-Here’s a fun, family-friendly Halloween event that is completely free. The Brass Pro Shops are hosting a Great Pumpkin Celebration Halloween Event on Oct. 21st & 22nd, 27th thru 31st. Click here to get the specifics for your location. The fun will include a photo with the Peanuts gang, free Halloween pin on lanyard for the 1st 100 kiddos,