kicknbug-
No need for the graphic and t-shirts...Doug took care of everything (see his original post). And they look really good!!! (thanks again Doug).
As for activities, I vote to not go crazy with it. A meet/greet, a BBQ one evening, a race one afternoon and a known lunch hook location every day are probably enough. Too many activities will make it stressful for you as the planner. Just my opinion..
With that said, I'll add something else

A photo gathering opportunity. I'm leaning towards writing an article for Small Craft Advisor to cover the event. 9 or 10 boats all tied off togther or just nearby sailing together will make for good photos. Another thought is make the race course small (say 50 acres with frequent tacks) and I'll sit in the middle and get close up photographs. just a thought...no biggie if that does not work out, I'm sure I can get photos as needed.