(Open for weekends starting Memorial Day Weekend, open full-time mid-June, closed after Labor Day annually) Chartwell Family Oasis has endless fun to offer for an amazing value. 6 Glistening Pools &, Giant Water Slides and Diving Board. Cooling crazy Splash Park featuring Dumping Buckets, Snorting and Spraying Magic Dragons, Underground Geysers and Surprise Sprays, Tennis courts, basketball court, sand volleyball, softball, croquet course, shuffleboard, cornhole and horseshoes, and much more!