My wife and I will be arriving at CTI with another couple in just 14 days for our second visit home!! I am hoping to get some suggestions for who to book with and when to book some excursions. We looked online and think we might be interested in the zip line tour and possibly the white water rafting or the ATV tour. Any suggestions on what company to book excursions through and is it best to book prior to arrival or can we book right through CTI when we get there. Thanks for the help!