I try and make sure I have a backup for everything. And sometimes a backup for a backup. Those temps are nothing to mess with. When it’s that cold I also tend to stay a little closer to shore. I don’t need to be six miles out and have a problem that I need to get back to shore for.
Something I learned the hard way last weekend is that from now on if the temps are extremely cold, I will be letting my truck run. A dead starter at 30 below on the day you’re supposed to go home is a real bummer. A 400 dollar repair bill and hitting the road 12 hours later than intended isn’t much fun either. Letting the truck idle for a day rather than shutting it off is not very expensive in gas in the grand scheme of things. Luckily that 12 hours allowed us to meet some really good people so it wasn’t all bad.
As for safety, I have a backup generator my father in law allows me to take with me. If my Honda ever dies, I’ve got his Generac. I also have a buddy heater as a backup heat source. I make sure my truck, and my 5 gallon gas container are full before sitting out for a cold night. We have an over abundance of blankets in the wheelhouse. From now on I will also be bringing a couple spare regulators for the propane tanks, as well as motor oil for the generators. Our lake neighbor last weekend had his generator die from running out of oil. He was sure happy at 8:00 at night when I had a spare generator I let him use. He had already used up his battery supply so the forced air furnace wouldn’t run. That would’ve been a mighty cold night for him and his family!
So anyway, that’s my list. Just backups and backups of all the things that keep you safe.