Re:
I don't see any reason you couldn't take them with you. My snakes have ridden quite well when we moved from Montana to Indiana, a 1600 mile trip.
Just keep them in smaller containers, like critter keepers with secure lids. Make sure to keep them away from temperature extremes, such as near an AC vent in the vehicle or direct sunlight, which can be deadly.
When you stop at night and stay in a hotel, bring them in with you and offer them water.
If you stop and eat somewhere, I'd try and bring them inside the restaurant if possible. Preferably out of sight, in a backpack perhaps? Thats what I did. Put the Glad-ware bowls in my backpack, and no one knew any wiser. Keeps from scaring the non-reptile oriented folk.
Other than that, I don't see any reason not to bring them with you. They're a heck of a lot easier to transport than a dog or a cat. =P
Out of curiosity, where ya moving to?