This is defiantly do-able.
Large fish farms (breeders) ship their stock all over the country and fish make it just fine. The majority of fish sold in the U.S. are bread and raised in California, where they are then shipped out all over the country.
Do you know how long you will be on the road for?
If you guys decide to drive straight there, only stopping at motels and such for resting, you should be there in about 4 days I would imagine.
Also, yes, they make these electrical conversion things that have regular house-hold outlets, and you can plug it into the cigarette lighter in your car. This should provide you with enough outlets to run filters and heaters.
To reduce the amount of stress your fish are going to experience, you should cover the fish containers during the move. Either buy all black Tupperware, or cover them with dark blankets! This is going to be huge! If you leave them un-covered, they are going to get even more stressed. So, by all means, cover them up so no or very little comes in, plus it will keep the heat in as well.
Also, like stated above, you will NEED a cover for the Tupperware, with a small spot cut out for the filter(s) and heater(s).
Also again like stated above, you will NEED to strap the Tupperware fish containers to the wall of the moving truck. There should be hooks provided on both sides along the inner wall of the moving truck.
We have moving vans at work that we rent out that have hooks that you can strap stuff down on the inside, and if you don't (like when I make deliveries with them and don't strap stuff down) it does not take much, a small corner maybe or change in speed, to move or knock down whatever I was delivering.
Also, feeding the fish should not really be necessary during the move (that is if the move takes around 4 days or so). Maybe if/when you stop at night to rest, I would then (once everything has settled down; probably an hour or more after the moving truck has been parked) open the containers, allowing light to enter them, and then try to feed a little bit.
-So, you will need to get that electrical adapter thing, probably sold at Walmart, perhaps O'Reillys sells it or other automotive related stores.
-You will need to have a cover for the Tupperware.
-You will need to cover the Tupperware in some way to prevent light from entering the Tupperware. I would just use dark blankets and use duct tape, and tape them to the side of the Tupperware.
-You will need to Strap down the Tupperware to the inside of the moving van to prevent the Tupperware from moving around.
-One last thing I thought would also be a good idea, and that is to place a couple blankets (maybe even a mattress) under the Tupperware to prevent the Tupperware from feeling every vibration in the road. These moving trucks have VERY stiff suspension because they have to be able to handle a lot of weight. Stiff suspension = rough riding.
Hope this helps! And do not forget to let us know how everything plays out!
p.s. If you are going to be driving, I would try to take it really easy. No fast acceleration or hard braking or fast sharp turns (unless in an emergency).
-FHM