Visiting SCYC again this August and want to take a trip to the Park this time. We plan to do it in our Whalers (either 2 13 footers or will trade up for a 17 foot) if conditions are perfect. My question is how far past Compass cay is it? 15 min? And can it be done on one tank of gas or should we bring an extra? Are there any fees to get into the park?