If you visit for a day can we return to our vehicles to eat lunch?

Yes you can but there is a cafe with tables and chairs within the waterpark area.

Free parking so yes :)

Yes you can leave and come back

Yes, you are allowed to leave and return throughout the day.

Yes you have a bracelet on that tells the date you are there and it's color coded.

Wrist bands are given so yes

Yes

Yeppers

Yes, you can.