>I haven't heard issues with auto transmissions, what do you know about autos and long idles?

Like I wrote earlier the only problem I know is that on non-electronic Chrysler transmissions there is no oil flowing through the transmission cooler while in park. But other than that I have never heard of anything else in other models. If the engine is running the transmission pump is also, and it is supplying transmission fluid to the moving parts of the transmission.

The insulation is a good idea. My farther-in-law had a conversion van that was fully insulated. On the coldest day the front heater kept the whole van very comfortable, even with all the glass.

I had thought about a spare battery with a 12 volt heater also. But the ones that I have seen have seemed cheaply built and not very efficient. Have you ever seen anything worth buying?

Paul