Do we have to pay

You always have to pay.....

There is a small fee to enter the gardens, unless you are a member. They also have a corn maze in the fall which has a separate fee (members receive free tickets for special "member days", but must pay for the corn maze on normal days).

Didn't pay for parking, just entrance

Parking is free but for the corn maze there are admission tickets that you have to buy

We didn't pay for parking or per car load. We had to purchase admission tickets. They have will call p/u & a booth to purchase them.

Yes. $5 per car. If the offices are closed there's a station where you pay. Make sure you have cash.