Frytown,

Here's mine... I built mine on 2010. I only buried the legs about 12" or so but did drill horizontal holes at the bottom of each to put in horizontal pieces of rebar. It has held up over the years and should be able to remove the whole thing someday if I want to...IIRC, I spent $60 or 80 on the tarp, but it was a good one and looks just as good today as 9 years ago. It really finishes out the playset. Composite decking has performed flawlessly, too.  About once a year the kids drag a tarp out and put it on the bottom of the slide. Drag a hose up to the top of the slide and VOILA, instant waterpark!

You can't see it, but there's a 6' x 6' sandbox on the side.

good luck -jim

(Back yard (full).jpg)

Back yard (full).jpg (129KB - 138 downloads)