Denise - you're already there. You will swim fine. By virtue of the fact that this is not your first time in a mass swim, you're guaranteed to do better this year. You've trained enough that your body has not fogotten what a marathon is and as you said, your cycling will rock and that's where you can make up the most time. AND, you'll have better nutrition this time round.

Hang in there. Taper is tough but just keep that mantra going, "you've done it before, you'll do it again."