Payments can be made on line. Return to the Events drop-down on hilltoplakes.com/Events/Activities Fees. This will open you up to a page you can pay online. Debit cards are no charge, credit cards have a 3% service fee. You can also pay in the Welcome Center or by phone at 903-512-0358. If you have any questions please feel free to contact the Activities Office 903-512-0358.