Your ticket also allows you free parking at the Disneyland parking structure which is awesome!
We didn't bring a car because we were staying at the Disneyland hotel and didn't need a car. If you can swing staying at the Disneyland hotel or the Grand CA hotel I would say do it! It's so convenient to walk back and forth to the hotel and park.
We went to the park early in the morning on Friday and then played in the hotel pool. I made sure that Mason took a nap later in the afternoon so he would be refreshed for the event. The little guy had so much fun that he stayed up for the entire event and didn't go to bed until 1 am! Such a party animal. We had an amazing time. If you go, they give you a wrist band for the the event as well as some treat bags. The treat bags are teeny tiny so make sure you bring one large bag to stash all of your goodies in. We probably hit up around 5 treat trails and came home with TONS of candy. We loved it. Definitely stay for the parade and enjoy the fireworks. I think we're going to make this a yearly event from now on.
Highly recommend! It's awesome for the kids and such fun for the adults.