Ah, SP. Having just made another (3rd) major move I'll throw in my 2 cents. Yes, what Pris said about the cleaning supplies. Even a spotlessly clean home can use some smudging. I always do this when I'm leaving a place, too. Smudge, clean, offer a prayer or whatever works...just putting out good energy through thought. Anyhow,
I've found that cats will quiet down after awhile. I'm assuming you will transport in a pet carrier. I'd not concern myself with them not wanting to drink water, much less eat along the way. Of course you'll need to have their liter box, food/water containers handy for your nightly stops. Our cats tended not to want much of anything except too hide under the bed. Make sure you have a can opener handy if applicable. And be very watchful of them when you open/close your hotel room door. Actually we always made sure they were tucked safely in their carrier before going in and out with our stuff.
Actually it's the heavier items such as furniture, appliances that we load first. Boxes and other loose items can always be tucked in any vacant spot. Even the seemingly smallest space can hold something. Use your linens, sheets and such to wrap pictures, lamps, whatever. I've used linens to pack stuff within boxes, too. Even blankets and such can be packed into refrigerator. Don't waste space - utilize dresser drawers, cabinet space, because no matter how well one plans...and I'm darn good at this stuff, you might find yourself running out of room if your not careful. OH, be sure to label your boxes. Even at that, for sake of not leaving a box half empty, you'll be tucking all sorts of things into this or that box. Of course with staying in motels you'll be packing for that as well as for the long haul. It's alot of work no matter how well planned you are. Dirty laundry already, and you aren't even moved yet...
I've left some of the less important things for last just in case I had to give them away. It's amazing, as you'll find out, the amount of 'stuff' we can accumilate in even a short stay somewhere. If you have a deep freeze with food you can load it up first, tie a knot in the cord so it won't come unplugged and run an extension until you actually leave. Your food will, I promise, be perfectly frozen when you arrive at your new home.
It is a good idea to have a lock for the back of your moving truck. Are you going to be driving a car too, or hauling it behind the truck? You'de be surprised what you can pack into the vehicle. We put our most precious,and expensive pictures in the trunk, and our computer inside the car.
I did chuckle in a nice way about being rested. It all sounds good, but is highly unlikely no matter how well ahead of schedule you might be. It is a stressful time so remember not to be short temptered with each other. Do take some streching time out...even if it's just when getting gas or a meal. We do take water, but find eating while traveling doesn't work for us. When you do eat, as already suggested, eat lightly. Constipation really happens to the best of us at those times. And having a map might save untold misery as Francious mentioned.
In a nut shell, enjoy the adventure. Use your common sense and don't allow the impatient drivers to make you feel rushed. OH, and whatever you do, keep your animal confined in their new home for a while. Its not uncommon to lose them if they are uncertain of the new surroundings.