I take my beardies home with me on holidays
. It's about a 6 hr drive.... but 12 hrs shouldn't make much of a difference as long as the car is kept warm (i'm in canada so i have to crank up the car heat for them in the winter lol). My older one sits with the passenger or if i don't have a passenger he stays in his vacation tank in the back seat. The baby stays in his tank because he's a spaz lol. I bring a blankie for them to sleep under, a portable tank for each (i use small aquariums), their heat and uvb lamps, food and you're good to go.
I love taking mine with me, last summer the older one even came golfing with me. We put on his leash and he sat in the golf cart!