National Parks

[dbulmer]

A quick couple of questions about National Parks:

1a. I can buy a Pass at any of the 'actual' Parks, themselves?
1b. When i buy the Pass, the discount will happen straight away... eg. the entrance will be free for the first park as well as all the future parks?

2. Does the pass just cover the entrance fee? or is camping included as well?

3. I'm going to be going to the Utah parks (Canyonlands, Arches, Bryce, Zion)... are the places to park for free anywhere near/around the parks? I'm going to be in an RV, so i only need a layby (obviously i don't want to break any laws either)

I know some of the points are kinda covered on other websites etc... but i couldn't find the exact answers i was looking for. Plus it is always nice to hear it from 'people' rather than anonymous text