We did a corporate relocation a couple years ago. I don't have much additional advice to give--it IS kind of weird, having people come in and pack up all your stuff. Our guys were great, though. DH and DS(then)11 stayed at the house for the big load-out, I took the other three children and the cats and drove 3 hours to the new home.
Our comapny had special people for "special" packing--by that, I mean a granite slab from a coffee table. Also, they had people come out and immediately hook up the washer and dryer for me. They were laughing, because that one little thing really made it seem like "home", you know?
Unpacking took me forever, though. In fact, I still ahve some unpacked crap in the basement. And it was funny--about 4 months after we moved in, I unpacked some dirty laundry! My oldest DD was asking for one particular shirt, I couldn't find it anywhere, she swore she'd put it in to be washed...and we eventually did find it. I had done a ton of laundry the day before moving day, thinking I wouldn't have the w/d for a few days, and not wanting to, well, find dirty laundry, four months later.
Oh, we did have one item damaged--a custom coffee table that had just, just been made for us. They sent out an insurance adjuster, who cut us a check immediately to pay for the repair. They were all super nice about it.
In any event, I wish you luck. The moving company will try very hard to make this as smooth and stress-free as possible for you.