If you have not used Priceline before, do yourself a BIG favor and go to Biddingfortravel.com. It has numerous threads that will tell you not only the most common hotels/star ratings as well as how much people are bidding. I used it to get pay $80 for Pier66 in Fort Lauderdale for our upcoming Bermuda cruise. The best online rate I could find was in excess of $249 per night. It works.

From what I recall there is not too much selection in the Napa area. You may do better in Sonoma. Also there are many very nice B&B's in Napa that would put most of the hotels to shame. We staying in one for a week a few years ago and it was great. Try www.napaonline.com or www.napavalley.com for some ideas.