Is there an entry fee or charge?

$8/adult No senior discount. Park is "open" year round but the road (13 miles) to it is not plowed during the winter.

$8 for adults, $5 for kids over 3. There are also a couple of tours you can do that cost extra.

Yes its 6$ or 8$ a person.

Yes as said parking is free. Bathrooms open. You will spend more time than you think. Take lunch with you.

Yes there is, cash only