Know where your best water source is. If you live in an area with hydrants, plan an alternative. Most rural hydrants will not supply enough water to keep one fire engine going. Plan how you would get a fire engine onto your property. They are wider than most pick-up trucks and they do not turn as well.
Ladder trucks are especially difficult to get around narrow corners.
Figure out if the ground will support a truck. Hay, gas, oil, scrap wood, etc. Place halters and lead lines in a location that is quickly available in the dark and for strangers. The problem with this idea is that you have increased your theft problem. Think about access to your barn in the dark.