If they are used to travel cages they should do fine, I have traveled with my fids, of course it was only for a few hours but I don't see a problem with longer trips, maybe stop now and then to give them some personal time. I hope you have scoped out some motels if that is where you are staying to make sure they will accept them but continue to go as close to their regular schedule as possible, make sure they get to bed regular time. Pack treats, food, toys and plenty of water to do them the entire trip, if they are harness trained you could take them out for a spell to let them get some fresh air and sunshine if that is an option.
When you get there assemble their cages and put them where they will be placed in the new house, they will adjust to the new surroundings and be sure to tell them what you are doing, explain things to them for they understand more than what we give them credit for.
Most enjoy watching the scenery out the window but if large trucks and the like frighten them as they pass you then have some towels or covers you could put across the side of the cage to minimize stress and play it by ear.