We did the same in our days in a "stix and brix", but before our 213. DW would fire the Onan on one of our previous RV's as a backup up to our little Kawasaki 2800 watt generator after it had ran through a tank or so of fuel. This during the many ice storm outages that would last several days. Of course this was while I was in some nice warm bed in a hotel room in the evenings, 300-400 miles away, after a hard day of calling on customers. I made sure she was prepared when I left, 20 gallons of gas for the Kawasaki and a full tank always in the motorhome in it's winter storage bay in our barn. The saying in our little rural Indiana town was "If the lights go out 3 times in a row, they'll be out for 2-3 days." Never failed in the winter. Now by November 1st we're usually south of I-10 until Mid-April.