Hi there, while I can't speak for CTI, I can speak from experience with couples water sports staff and beginners snorkeling. We were at CN a few years ago and went on the night trip...my husband thought it would be fun. I had never snorkled. After telling the staff this they made sure to stay with/near me the whole time and work with me on my issues. Night time is NOT the time to be your first trip. I did enjoy myself, so much even w bought our own gear for this trip next week to CSS.