We did Sea World plus 3. Thanks to another review posted, our trip was great. Do not wait in the long lines at the ticket counter. Just go to the entrance and show your explore pass on your phone to the attendant. No waiting in line to get in the park. BTW...the animal show is really cute!
We did the Hop on Hop Off which was very informative. The River Walk was amazing. Loved the Natural Bridge Caverns. The whole area at Natural Bridge is very relaxing other than the 125 feet hike out of the cavern...just kidding. There are zip lines, panning for stones, delicious home made fudge and tons a picnic tables if you want to pack a picnic.
Explore Pass is the way to go! We had no problems at all with entrances to our chosen attractions.
Worked great and saved us money. It seems shady buying it on this site as the information isn't very clear about what you get, but it works as stated.