We arrived without a booking and paid $20 each with a $2 off voucher from one of the tourist pamphlets. After a wait of about 40 mins, in which time we had a look around the animals at the back of the property we got in a boat with our tour guide Dan. Since no-one else had turned up we basically had a private tour. Dan was a great guide, telling us all about the Everyglades and stopping at the gator holes. We got to half a dozen gators in the water, and hold a 3 year old once we got back to the dock 45 mins later.