In our case, having a dry hydrant made it possible to get insurance at a reasonable rate. It was not a matter of how much a given company would charge, but of which companies would even consider us. The local volunteer fire dept. comes every year to test and back-flush the hydrant, a fun thing to watch.
Since I fertilize very heavily in the warm months, I especially hope that we don�t have a fire at that time. The pea-soup in the pond would really stink up any part of the house it gets into.
I also put in a lawn pump and ran a line well back to a hose bib in the woods in case any brush fires get too close to the house.
Lou