The first two cruises, we did snorkling on the family beach, which was alot of fun. It's a basic (and pretty easy) snorkling course...so unless folks really want to swim together, you could probably share the equipment. After snorkling for a while, we headed over to Serenity Bay and spent hours floating on these really great blue floats.
The last two cruises, we immediately headed to Serenity Bay and after grabbing lounge chairs, we hit the water with floats. I've only used the blue kind, but last year, my DH got the tube kind and said he really liked it.
Have fun!!
Ginny