Thank you responders! (I'm new to the forum and thought that I would get an email when someone responded, and I just came back to the forum to check.)

I'm going to dig into what you provided and see if I come back with more questions. I was envisioning traveling with a tent and using either wilderness spots or designated campsites.

update: The quick and dirty link is really helpful. It looks like you don't have to reserve the backcountry campsites, you just need to be able to find them.