we also were only on the 3 day cruise....
since it's such a short cruise, you really don't get that much time to enjoy the ship.....for that reason i think i would stay on the ship if my kids would let me..
however, my kids won't....but they were 15 and 18 when we sailed (and will be 16 and 20 when we sail this summer)....
we went to the atlantis to swim in the swimming pools (we rented a room so that we could have access to the pools)...
we arrived at the pools at about 10 AM and we were already on our way back to the ship by about 1 PM....
my kids were starving by that point....i would have bought them lunch at the hotel but the place was so packed the lines for food were about a half hour long....and it was so expensive we figured we'd go back to the ship for lunch....
on the ship we went to the special afternoon showing of lilo and stitch (which had just recently been released)...
bottom line, we spent a total of 5 hours off the ship...
i'm sure i would have enjoyed staying on the ship more...
traveling with preschoolers isn't easy...i would stick with the ship if i were you...
you'll be at the beach on the
castaway cay day....
but maybe you like beaches....