If there's a change to the swim course you should get info from the Race Director. Keep an eye on the event website, and if it has a Facebook page you might check that out to.
They should also say something about it at packet pickup, and if they have course briefings in conjunction with that (which you should definitely attend anyway) you can ask the question.
Make sure your goggles dont leak, and DONT DRINK THE WATER!!!! Try to outride and outrun your stink. Avoid being behind other athletes throughout the race. I dont know what else to tell ya.