If you want to explore the Point Reyes National Seashore you do not have many options.  This facility has been there a long time, and while not the best, it gives you great access.  It is mostly used for RV's some appear to be year round residents.  I am a tent camper and there are tent camping sites.  They are on a grassy area and not well defined.  Not a lot of shade for tent sites.

That being said you are at the gateway to a large fabulous national seashore.

They have great ameneities - a store, post office, hot showers.  Everything you need is there.  There is a great restuarant down the road and a church next door!