yeah SR50 will take you all the way over their pretty much, all the wa y to the split after the Speed World. Personally it would be a shitty bike ride with all the straightness of SR50 and such. If you take 50 to clermont, jump on the E/W expressway it dumps you out back on SR50 AFTER Orlando. Traffic lights = no fun on motorcycles.

EDIT: instead of ride ALL THE WAY over their to watch a shuttle then ride back, get over there by like 10am, change into some shorts and hit the beach until launch time. Make a day out of it. Hell, you guys could even swing by the races later that night at Speed World.