Hill Catch

A little bit up hill you make a large 30 X 30 sand box and fill with poly plastic (about $20). Drain this into a big plastic holding tank every time it rains. These tanks cost about $100 at a farm supply store, the piping about $20. Remember to bleach or boil the water. You could simply dig a hold or use pressure treated lumber to make an actual sand box. If it gets cold enough to freeze, you can allow the water to collect and then unfreeze chunks when you need them. Be sure to put dividers in or you may never get it apart.