I did get to go down to Louisville and do a half iron right before I got injured and it covered a lot of the course for the full, so wanted to pass along some tid bits. It is probably going to be hot, very hot, it was the day of the half. You won't notice it much on the bike because you have the cool breeze from you zipping through the hills :-) Just make sure you are drinking, a lot, on the bike to prepare for the run. The electrolyte tablets are great too for helping with this. They are something you should be able to use without pre-training with them all that much, so maybe give them a shot on a few rides and see what you think. The hills really aren't that bad out there. There is one nasty hill on an out and back portion (like ride 1694 or something). Enjoy the downhill, get into aero and go, because you will turn around and go right back up it! Use your gears smart (a lot of people were trying to push through in a high gear and it wasn't going well, I was close to granny gear, but passed over 10 people on the ascent just because my legs were actually moving). Enjoy the scenery- oh my gosh is it beautiful out there. There are a ton of horse farms with acres and acres of land. There was one point on the ride where I was riding and there was this beautiful Thoroughbred galloping along side me in his pasture, I had to slow down and just be at peace for a minute at some of God's beautiful creations. As for the run- just keep moving forward. Less than 1% of first time ironmaners run the whole marathon, so just keep moving, whether its a shuffle or a walk, just keep MOVING!
Alright, I think thats all for now. Oh yeah, the swim - use the current!!! But you guys are all swimmers so I don't think that will be much of a problem for you. Just remember it is a river so the current is the strongest in the middle - use this to your advantage, if you are swimming against the current stay towards the edge, if you're swimming with it, move more towards the middle.
I will be thinking of all of you, trying not to be bummed about not being there racing too, good luck and most importantly, HAVE FUN!!!