i would have them rooted in your preferable medium. i would make sure they are rooted as to have less stress on the transport(even through there really wont be stress on such a short trip) and both yall will have a greater chance at keeping the clones alive with a strong root system
since using dwc do you use rockwool or rapid rooters? i would use what both yall prefer as a medium

give them a good moist medium and they should definatly beable to last a few hr ride