If you want to go to both parks on one day you will need to buy a 2 or 3 day park hopper or an annual pass. If there is a 1 day hopper they do not advertize it on the ticket booths. You can ask them when you get to the window.
Hi,
Why wouldn't you just buy a ticket for entry to each park. It would be less than a hopper pass. You have to pay full price since your only doing one day. Buying a ticket for each I think is still less than any hopper that is offered.
have a great time,
thatmom