Funtown Splashtown USA’s Adults-Only All Grown Up Event Set to Return for 3 Nights in 2023Funtown Splashtown USA’s Adults-Only All Grown Up Event Set to Return for 3 Nights in 2023Saco, Maine's Funtown Splashtown USA will host its 21+ event All Grown Up event 3 nights this year. ChantelChantel