I decided to gamble on hotwire...
I won out on the rental car from Nashville - Economy car, Hertz, for 20 bucks a day. Not bad.
I think I lost on the hotel. They had a deal for 54 that was normally 163 in the airport/expo area, which I thought for sure would be the Holiday Inn, but it turns out to be the Best Western Plus. Which doesn't come close to 163 per night in any of the searches I show, but oh well. Win some, lose some.
Anyway, just thought I would let you guys know if you were thinking about using hotwire...