Looking for some advice and guidance really. Have a section of the garden that I have fenced off for the little one to have a climbing frame/swingset/slide set up. Before I order that however, I am undecided on what to do about a base.......... The area is the lowest point of the garden and the soils is clay from about 150-200mm down. I had previously covered it in gravel but under bad weather water pooled in the middle. My first thought was to deck the area (4.8m x 3.6m) then fix everything to the decking. The only issue here is current timber and decking prices. Looking at around £850ish at the minute. I'm just conscious that if I put sleepers around it and fill it with bark/rubber, they will rot and smell as they'll be constantly damp. A concrete slab or slabbed area would just move the water elsewhere, as would just raising the low point. What other options would you guys recommend looking into?