the rays are a must see, its up to you if you choose to do an RCI excursion or do it on your own, its all about your own comfort level.
Get a picture book at the library about Sting Rays that is age appropriate for your daughter. The rays can be scary at first, but they really are very gentle. If they swim by you and brush your legs it feels like a gentle tickle from a feather. Your daughter may pet them if that would make her more comfortable, the dive masters are great, very informative
You might research some of the private sting-ray snorkeling excursions on Grand Caymans...they usually mean smaller crowds and more personal attention than the cruise-line "cattle-calls". Just a thought.
luvcruise - as long as nothing goes wrong you will be fine. Personally i would like a little more "wiggle room". I do not like the last tender at all. I want to be on the ship before that. The tour operators really know how to time their excursions to accomodate the cruise ships.
Thanks for your advice. I emailed Captain Bryan and they offered a snorkling trip that leaves at 10:30 am and returns at 1:30 pm. It has 3 snorkling stops. Now I'm excited and can't wait for our FOS cruise this October