We ended up staying two nights at Calistoga Campground. If you are wondering it is a parking lot of a fairground for $52 per night. Yes there was full hook ups available. This time of year it was relatively peaceful because it was almost empty. I could see how it could get loud during the summer months. But, location, location, location. You can easily walk into town and Calistoga seems more centrally located for the areas we like than Napa. St. Helena was great. The food was great everywhere we went and you can not find a bad glass of wine. We are already planning to return next year. I complain about the price but compared to the food and wine budget it was a drop in the bucket.
After reading the reviews on Yelp we are glad we passed on the Napa Valley Expo park. We drove by the Alexander Valley Rv park and it was beautiful on the Russian River. But according to Yelp it turns into a overcrowded dump.
We are now in Carmel and looking forward to seeing what it has to offer.