Is there an entrance into the park without a lot of stairs?

Yes not from paking tho

I think they are all without stairs.

Yes

Yes, all the entrances are on the street level. However, there are stairs to go down to the seat unless you get the disabled seats.

Yes if you stay on the 100-200 level area.

Yes. Stay 100-200 level, otherwise you'll have to take escalators. They do have elevators too. If you or a family member/guest have mobility issues, check in with customer svc. They are very good at taking care of the fans.

Yes, the main area is street level.

The Battery entrance is best.

Yes, red deck to the battery.

Yes. Main entrance is inside the Battery.