So I just learned that there is a National Parks magazine. Why did I not know this before? Craig and I are going to try and find some back issues, but if you are interested you can read articles and subscribe on the National Parks Conservation Association page. Stay Wild magazine also has an issue about our national Parks free to read online.
You may also want to check out National Parks Traveler for some great stories and info. I am not sure if we mentioned them in the past.
The National Parks Experience is releasing several films about the national parks.