Looking at excursions here: Both the French Beach Rendezvous OR Afternoon Beach Bash at the same place. WHAT's THE DIFFERENCE????????? OR Should we just do the Under 2 Flags Tour? --- we're Fair skinned --- & have kids. but the Caribbean water is Sooooooooooooooo pretty. What to do??? Specifically - can you explain the difference betw. the 2 diff. Orient Bay tours????