Do they charge to get in?

Yes. All of the National Parks such as Yosemete. Yellowstone, Sequoia etc. There is a entrance fee of 30 dollars per car. However if you get the annual pass for I believe 80 or 90 dollars it's good for the whole year for any national park in the USA

Yes 30 but get the annual and all the parks in the area

And the $30 per car grants entry for a full week.

Yes

Hi Alex, I don't remember.