Originally Posted by Geofrog (Post 706989)

My suggestion would be to get a large rubbermaid container, a 25-50W heater, and a power inverter. Transport ther coral in the container with the lid on and plug the heater into the minivan using the inverter.

I've transported corals like this over relatively short drives (1 hour), using the heater.
Not sure how well it would work over longer period though.