Originally Posted by Kanoe

In Whitehorse we get similar weather to you up there in Fairbanks, although likely even a little warmer than you on average.

It is the standard to run the full compliment of heaters, at least if you are a mechanically inclined person who cares about the vehicle. I always run the block heater, battery blanket, oil pan heater and tranny pan heater (if an auto trans). Connect them up to a 4 way extension cord behind the grill and bring the one thick cord out. With this set up you only need 3-4 hours on a timer to warm the truck up in the morning. It's worth the investment if you intend to be there for a while, seriously cuts down on the warm up idle time needed. The battery blanket and pan heaters are all pretty cheap and easy to install. I like the small 75 to 100 watt stick on pan heaters that use high temp silicone/gasket maker to stick on.

With this set up I would only leave it plugged in all night if it was hitting -50. To be honest it is mostly the corolla we drive in the winter and she works a champ. 4runner has the same set up in case she is needed.