I love Pt Arena. The lighthouse is historic and has an incredible past; if you are anywhere near here I absolutely recommend stopping by and taking a tour (get ready for stairs). It’s only $5 a person, dogs are welcome on the premises if not inside the actual lighthouse, and there’s a great gift shop. You can also rent the lighthouse keepers quarters, which I’ve never done but seems like it would be a unique experience. I wish I had factored this into my trip, but of course you need to book them way in advance.
In Pt Arena, you are far from major towns but you have conveniences close at hand and a choice of directions to go, whether it’s down toward Sonoma Valley and the wine country, Point Reyes, or into Anderson Valley (underrated!).
Camping in this area gives you a special place to kick off into areas that most tourists don’t even know about, or don’t get to see through your eyes because they’re tucked away into posh $500/night B&B accommodations. I woke up early because I had to get back to San Francisco and I had Highway 1 almost all to myself. It was one of the most gorgeous, amazing parts of my entire drive.