Have stayed at the Petaluma KOA several times in the off season and have always been happy there. The first time there,I guess the young lady,teenage girl, must not have understood me when I said that my TT was 35' overall and we had an Excursion pulling it. We got to our site and the TT barely fit it and had to park the EX next door. Went back to the office and told them,another nice lady and she put us in with the long timers in a huge pull-thru and we have gotten that same site since then just by asking. One of the nicest KOA's we have stayed at.
It is handy to the roads out to the beach for the cheese factories,Olema and above all, don't miss Point Reyes.