Yes, there are some things anyone considering riding at Smathers needs to read over at:
http://fksa.org/showthread.php?t=5813 There are a few basic things you must do to keep your kite away from bystanders, powerlines and road traffic. I think both thekitehouse.com and keywestkiteboarding.com run kiting sea taxi to the flats.
Hope you have fun down there!