First time joining City2Surf. Any advice?

City2Surf is this coming Sunday, I am kinda prepared since I have ran several laps around the public park near my place. Any advice for newbies? I actually booked Yellow Wave since I am not confident with my own speed back then. Should I carry small bottled water? What if I got *knocks wood* medical episode in the middle of the run and couldn't finish my run, what will happen to my baggage at the finish line, will someone be able to retrieve it? I also bought a sportograf add-ons, like are these a printed photos in designated booth or like online only?