Question:
Trying to keep warm in the winter while you sleep and also trying to follow company idling policies and/or state and local idling laws can be a tricky proposition at best.
What ever you do to solve this issue, DO NOT use a kerosene or propane space heater or stove in the cab of your truck. Drivers die every year from this due to either fires set off by these items or by carbon monoxide poisoning.
Answer:
Several years ago when was young and foolish I decided it would be a great idea to keep the chill out of the air inside the cottage by leaving a 20,000 BTU Bombardier Kerosene heater running overnight... with no windows open.
I woke up at 3am...
-It was cold.
-The heater was out
-I had a headache.
-A match would not stay lite inside the cottage.
I woke everyone up and instructed them to head outside, then opened all the windows.
Inside the small confines of a truck it would take less time and you might not wake up.
Leave it idle if you can or get a winter rated sleeping bag... a real one. You won't be cold inside it, but you will be dancing around in the morning when you do emerge from it.

Answer:
I think a gas heater in a truck is right up there with starting a campfire on the pssr seat. Unfortunatly with the new laws theres no doubt some may try it.
I learned theres a little way around some of the idleing laws. Take pet along with you. Seems they worry more about an animals comfort than the drivers.

Answer:
just courious... i know that in the morning when you emerge from the bed youll freeze your toosh off, but what about an electric blanket? are these good for the truck or a no-no?
thanks...

Answer:
Alot of drivers use them. If you shut your truck off then you will need a 12v heated blanket. The other types used off an inverter will kill the batter. I've heard they work and I've heard they work but not very well.
Dont buy one at a TS if you can help it. Walmart if they have 12v would be better.
If it gets to dang cold just start the truck and let it idle.

Answer:
Anything you plug in and use when the truck is shut down should have some type of battery protection on it to keep from draining the batteries to the point they will not start your vehicle.
Some of the larger, hardwired inverters have this feature built in. You can also buy a device that plugs in between your power outlet and the 12v item you are using.
From what I have heard 110v electric blankets will not run off a small inverter (300-400 watt plug in type).
I do know that an electric heat pad (the type used to treat sprains, sore muscles, etc.) will run off the 300 watt inveters.
I do not know if they have improved them or not, but the 12v blankets/throws did not last very long. When I used to work at Wal-Mart we used to get them back all the time and also had 2 recalls in 3 years on them.
Answer:
Yep the bigger hardwired inverters will probably work except most companies will not let you hard wire an inverter.
Some do not allow the cig. lighter type.
Some companies are going to a "Bunk Warmer". Maybe you can get one if they are sold retail.
After a 30 second search I found one right here at TN.
Bunk Warmer