Gotta say I'm a little jealous you get to pick them up. I have to have my geese shipped this summer even though the hatchery is about 3 hours away. Seems like such an unnecessary risk to ship them overnight.
Congrats on your soon-to-be new chicks!
I put my heater on in my SUV and aim it down on the passenger side. Then I put the chicks on the floor. Keeps em nice and warm. But handwarmers are a great idea!!!!