Boarding them for the move is a good idea. I know of one woman whose two indoor-only, lazy, spoiled cats completely freaked when the movers came, and dashed outdoors when one of the guys left the door open for a minute. She never did find them again, despite weeks of flyers and calls and posters around the neighborhood, we just hope someone found them and took them in and just didn't see the notices.

By packing them up early, you also don't have to worry about where they are every time you move something large and can't see where your feet are landing - mreeeowch!