We have done this section on our bicycles (recently - in August, going southbound).
Bodega Bay has Hole in the Head, where PG&E once had a project to build a nuclear power plant (!), but scuttled the idea after local opposition (this also started the whole anti-nuke movement). Now it’s just a scenic area with nice views, and a pond where the silo was being built. On the drive out there you can stop at Spud Point for seafood and beers.
Fort Ross - the old Russian fort is interesting to explore if you have some time.
Mendocino - well preserved little town overlooking the Pacific. A nice place to take a walk and have lunch. Good market right in the center of town.
Fort Bragg has everything you need. The North Coast Brewery is there. North of town is the Old Haul road, with a rebuilt trestle over Pudding Creek - the trail is probably best on a bicycle and leads to MacKerricher State Beach. You can also walk along the bluffs on a new trail the town just built.
Westport - stop in this hamlet to see the Westport Whale. You’ll know it when you see it.
In Leggett, there is the Drive-Thru tree (your Miata should fit!), The Peg House (built with pegs, not nails) which has a store, and nice patio for beers, burgers, and oysters, and Confusion Hill, which should address your whole kitsch need. 
I don’t know much about Garberville except we rode thru there quickly. You can probably score some weed there, if that’s your thing, tho. Just north of there is the south entrance for Avenue of the Giants - be sure to take that instead of Hwy 101.
All along Hwy 1 there are spectacular views - be sure to stop, savor, and enjoy!