It definitely can be done. Try to find out from the tour EXACTLY where they will let out. Then contact the schools in that area and ask them how it all works there. I took a cruise and it stopped at Aruba, then I just found someone to take me from the trinklet-ville center to the kite huts and rente...
Someone wants to do a home exchange with me that has a place in St. Martin. I remember hearing it has some good spots. Anyone been and know if it's good in Feb?
Can't speak on the Ovando. But the Argo is a great lightwind kite.
I weigh 170 and have had the Argo out in 10 knots with a surfboard.
And 11 should be a good size for your weight.