I dont have any experience transporting aros, but i did haul my cichlid on a 2 day journey with me... the drive was about 30 hours but I stopped at a hotel to stay the night, any ways, I just put him in a bucket and did water changes every third gas stop. I treated the water ofcourse and I ussually used water from jugs that were in the car. I would buy a new one and leave it in the car so that it becomes room temperature, so about 75 degrees.
I did not use any form of oxygen for the little guy, but he survived the trip with out a scratch!! Ofcourse, cichlids tend to be hardier than aros so you may not have the same results, but if you do take all the measures such as large enclosure, oxygen, water changes then you should be fine on a days drive imo