6-month farm rental: can we skip service in winter?

Monthly service is fine for a lightly used unit through a frozen winter, but skipping service entirely is a bad bet. Low use doesn't stop the real problem. The blue charge in the holding tank is mostly water, and once it freezes solid the driver can't pump it until a thaw, so whatever goes in just sits there till spring. Our barn unit went two months untouched one winter and the tank turned into a frozen block with a pile on top. Nobody wanted to use it after that.

What worked for us the next year: ask your operator to switch you to a winter charge (salt brine or an antifreeze mix in place of the regular blue) and lock in a monthly service frequency on a day they already run your road. Schedule around the forecast, not the calendar, so a storm week doesn't eat the visit. And move the unit out of the drift line to a spot where the truck can park within hose reach after a plow pass. One missed visit on a lightly used tank is survivable. Two in a row is when you get the mess.