Tim
I have been doing the same. Where possible, I ask the customer if I can plug my electric heater into an outdoor outlet and let it run in the van. I have a large thermometer in the window of the van so I can see it from inside to make sure the temp is ok. I insulated my van also. I think it helps. But every time you open those big doors it takes a while to get the heat back.
Ron
Your invitation is sounding better all the time! I have a couple of competitors that close from Dec. – March. Makes business a little better for us. We are having a heat wave this week. May even see 30 degrees today. Will feel like spring!
Rick McConnell