Totally free so kids and adults can have hours of entertainment. Pack lots of sunscreen because you will spend a lot of time in the water. Take as few possessions as possible and certainly nothing you want stolen unless someone is willing to stay behind with your stuff. This is not just Leanyer or Darwin for that matter I would follow the same principle anywhere where noone was watching your stuff. There are bbq facilities and can byo everything except alcohol. Slides are fantastic and park is well parolled with life guards. Fun and family friendly environment which is totally free.