A few more points to consider.
You will need air stones specifically designed for O2 and not "air". They are $50-$75 each. You will have to stop and check the fish periodically to make sure they are getting enough O2, but not too much or you could burn their gills.
The biggest thing is that if you are hauling the fish, they are yours and you take responsibility for them once you leave their facility. If they deliver them, they are responsible for them until they are in your pond. (and good haulers will stand behind the fish for a few days past that).
