There are no campgrounds in Sebastopol, but it’s on the way to the campgrounds in Guerneville, Duncan Mills and on the beaches, like at Bodega Bay. It’s also near the KOA in Petaluma. (The KOA in Petaluma is very expensive, like $60-70 a night, and they pack you in like sardines. The campgrounds in Duncan Mills, like Casini Ranch, are much more scenic, like right up to the Redwoods, and closer to the beaches. Those are $50-$70 a night for RVs.) There are also some Sonoma county parks, like Lake Sonoma a little west of Healdsberg, that take RVs, and are about $35 a night.
Sebastopol is an eco friendly, socially conscious little town, saturated with kitchy and whimsical art, nice people, classic hippy style, great restraunts and organic and gourmet food, reasonably priced. They also have movies, lectures, music, and other entertainment on a regular basis. So if you are in Sonoma county, stop by Sebastopol, on Hwy 116 or Hwy12.