I would put the snakes in sterilite tubs with airholes, and on stops at night put water bowls in with them so they can drink, just dont let them get too cold. Hand warmers under the tubs can help with that, or heat in the car from the air conditioner. Dont let the beardie get his legs twisted up in the bars on the dog carrier, he could break his toes or even legs, you may want to consider a plastic tub with airholes for him too! And dont feed any of the reptiles for a number of days before hand because you dont want the snakes regurgitating because of stress and cooler temperatures will cause the food to rot inside the snakes and even the beardie, so let them clear out their stomachs before the move, the beardie has a faster metabolism than the snakes though, so just stop feeding a day or two before for him, but again make sure he is hydrated, give him a bath the day before you leave. I would soak the snakes beforehand as well...