Most large truck stops in CA have parking stations w/ AC ducts and power so the drivers don't need to idle the engine while sleeping. The state promotes that to lower pollution, though I think the cost savings in fuel and less wear makes it economical regardless. I recall talk of laws to prevent "idling while napping", but not sure of the status. In northern Alaska, I think they keep diesels running all winter since otherwise they won't restart until Spring. As an easier interim shutoff, you could hook a hand vacuum pump to the hose going to your stop valve. A few pumps should stop it, then release the vacuum.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans