we have annual passes u can do almost everything on a sat or sun in the summer. we always go on sat or sunday. If u want to do the water park which is geared for his age group and the aquarium i would do two days. theres a motel 6 in carlsbad down town two exist south of the park is between 50-60 a night we usually stay there decent and theres dennys in the same parking lot for breakfast or dinner.