Two of us stayed in a Riverside tent on a Thursday and Friday during January. The tent was quite comfortable. The bed was extremely comfortable and I especially loved the bed warmer which each side can control to their liking. I was afraid of being cold but that proved not to be justified as there was also a good portable radiator in the tent.
There were very few other guests, so noise was not a problem from that standpoint, and the location is quite nice on the river with the big trees - the road noise fades after a while. The first night I did hear quite a bit of traffic in the morning so I would definitely recommend keeping your earplugs on securely, which I did the second day and had no issues. It was a fun alternative to a hotel in Healdsburg for the same price, which was our original plan, and making a bonfire at night gives it a bit of a camp feel while still sleeping in a real bed - however this is not a remote spot if you are looking for total peace and quiet - it is right on a somewhat busy two-line road.
In the morning the complimentary coffee was quite nice and the array of goodies to purchase in the little store is a much better selection than what you will find in town in Geyserville, where we stopped at both bodegas. Very friendly staff, clean bathrooms and showers, would consider staying again.