Did your 4 year old do ok on the boat over and in with the stingrays?
my son did fine on the boat so long as he was sitting either in my lap or next to me while it was moving. last year, when we did the golden eagle in st. maarten, he would only sit in my lap. this year, we rode out on the netting (not a large area) and back on the deck as the older kids were reclining on the netting. 5 across was all the room there was on one side of the netting.
also, the day we went was very choppy. and when we got to the sandbar, there were too many people, so the captain took us over to the reef area first. ds was game to go in the water with me (they have little kid vests, but you have to ask for them as they keep them below in a separate area from the snorkel vests), but once he got in and hit by a wave, he wanted out. when we went over to the sandbar where the stingray were, he wouldn't even consider going in. and....after i went in and had trouble helping older sons (11 and 9), i was glad he refused. i would not have been able to manage with 4yo ds.
that said, i was told our day was very unusual, that normally the waters are so calm you can walk to the sandbar. i guess it will just depend on how calm your waters are and how adventurous your 4yo is.
Did you have that type of boat? The picture on the website shows a 10 passenger, catamaran boat.
we were on the Hannibal which held probably 40-50 people and is a triamaran. it's the second picture on the page
http://www.cayman.org/captainbryan/
note that the netting area (as i call it) is very small and does not cover the entire front end as with some other catamarans, but has 2 small sections of netting, one on either side of the middle pontoon.
Did you do the 2 hour excursion? Did they get you at the dock or did you take a cab?
you know, i never paid attention to the length of time we were out there. we booked the 2.5 hour session. we had to be there at 8:30-8:45 and we walked to the office. once you get off the ship, you take a left and keep walking for about a mile (i guess...i have no concept of distance when i'm in a hurry!). you will pass capt. marvins, then go around a curve, and just past the bakery (with the roosters out front), you'll see a small housefront that is the capt. bryan office. we walked there and back (me and 3 sons...11, 9 and 4) without a problem (except we were running late and it was HOT!). bring bottled water!
the boat is not docked near the port where we docked, but on another side of the island. they load groups up in a variety of vans (which have seat belts) and take you to the boat and then return you to their office upon completion of your excursion. our driver did drop one of the families we were with off at a hotel along the 7-mile beach as they wanted some more beach time before returning to the ship and it was along the way. so, don't hesitate to ask if that's something y'all want to do. my kids had had enough water at that point.
Did you have to pay upfront or at the ship? How far in advance did you book?
we booked the end of january for our 5/24 cruise. we paid when we got to the storefront. they were nice enough to NOT charge me for my dh who wasn't feeling up to coming (in spite of our having a reservation). total for me and 3 ds was $105.
if you have any other questions, don't hesitate to ask.