Well if you want Marin, I suggest Point Reyes at Sky Camp. Specifically sites 5 or 6. I've stayed at #5. liked it better than all the other sites. Best trees there. You can set up several good hikes around the area. There is water, toilets and grills there. No wood burning outside of the grills. You can park your car and walk in on an easy trail off of Limantour road or park at Bear Valley visitor center and up an over a small mountain. This route will take about 1-2 hours depending on your speed. I'll try to dig up some pics of the area.
Link to reservation:
They fill up fast so book in advance.
Here is a pic of Camp 6 looking towards camp 5: