quikcrete :thumbsup: also, you could try laying carpet, but that would have mixed results on dirt that absolutely cannot hold a form.
if there is a mix of different particle sizes, shovel away the bunk sand, and hopefully you would be left with more formable material, clay would be the ideal, with a little bit of loam. if it's just straight sand, you're screwed, or up for some higher maintenance than your girlfriend...
if there is a mix of different particle sizes, shovel away the bunk sand, and hopefully you would be left with more formable material, clay would be the ideal, with a little bit of loam. if it's just straight sand, you're screwed, or up for some higher maintenance than your girlfriend...