I just wanted to add that there are some other fun things you can do without the park admission.
There is a Pirates and Pals fireworks voyage that leaves from the CR. You meet at the CR, get some snacks and some photo ops and then you board a boat to view the electrical water pageant and the MK fireworks.
At FW, there are haunted carriage rides (in Oct), Hoop Dee Doo Review, and Mickey's Backyard BBQ.
No park tickets required.