Sounds like you're as ready as you're going to be!! My good friend is doing it, too. We are flatlanders, so he trains all summer at the stadium steps at OU. He's done it the last couple years, and I think this year he's doing the double (the half then the full the next day)??
I hope to do that some day, but most likely not until I retire, as it's always the first week that school starts and I can't take any time off that week.
My runs have sucked in the heat lately. Trying to heart rate train, and it's just not working out. More walking than jogging/running. So for now, I'm leaving my HR monitor at home and just running (even tho I know it's in the high 160's- I just don't care).
4 weeks until my 50K. I DNF'd the last 50K I attempted at the end of June (only made it 27 miles), so we'll see how I do in the heat with this one. If I have to walk the whole dang thing, I'm going to cross that finish line this time, dangit!!!!