Jessica, 35, rocked a tiny pair of Daisy Duke shorts for the day teamed with Mickey Mouse ears and t-shirt with flip-flops.
The former reality star was joined by her husband, Eric Johnson, 38, and their two kids Ace, 4, and Maxwell, 6, on the trip.
The family was spotted mingling with other guests and having a great time inside the park this weekend.
Proud dad Eric was seen taking photographs of his family and shooting video as they toured the park.
Ashlee wore her hair blonde with denim overalls as she carried her daughter Jagger Snow, 2, around the park.
Her son Bronx Mowgli, 9, by former husband Pete Wentz was also in attendance.
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