My point is screw the legality. Land where you want to land, launch where you want to launch. What are they going to do? Sure you might get a few tickets, but that's not exactly the end of the world either. An idea would be to not have scheduled stops where you all hit the same spot on the same beach on the same day. Ground crews could meet with their teams where ever they need to.
Making it a smaller effort is what it needs to survive. I don't know if I have any interest in doing the Tybee myself, but I think its easily the coolest catamaran race in the US. I've got nothing but respect for you self loathing SOB's who do it, and I don't want to see it go away permanently.