I just used Hotwire and got the Napa Valley Marriott for $98/nt. for Sept. , (it is the 3 1/2 star listing that says customer favorite, it lists having a pool/spa/restaurant, and map shows it on Rt 29/Redwood Rd, so I guessed that was the hotel and it was! ) also got a SUV rental w/ hotwire at a rate much lower than from any of the car rental web sittes or expedia!
More money for Food/Wine!!