If you have one day then plan to do Splashtown early and then hit the rides later in the evening when its cooler. If you have 2 days then you can do Splashtown one day and Funtown the next. A combination ticket will get you into both parks on the same day and is probably the best value. Splashtown tends to fill up quick so stake out your chair early in the day or picnic table if you plan to bring your lunch. Some of the bigger rides can have some longer lines so hit those rides early if it fits your schedule.