Can you tent camp in the primitive spots while driving in? I understand the spots themselves are hike-in, but can I park my car in the park itself and hike in to the spots?

Yes. You park your vehicle in the area where you register. The path to hike back is right off from there. You can pick up a map and there are signs alsp you can use to get back to your spot.

You can park in the park to go to the walk-in spots

They have sections that you can tent camp. As well as cabin camping. And rv camping..

Good question, maybe need to buy a parking pass. I would call them