You might consider building a "Mobile rain water collection system". Basically a system that you build, dissemble and store in the garage until a "rainy day" (pun intended).
They're simple to construct and can even have filtration built in.
JYD #123 The great one formerly known as Architect.
I am now a fictional British television police officer (currently a Detective Sgt) at Thames Valley Station. My governor is Detective Inspector Fred Thursday and it’s 1969.
