I would rather hire a trailer myself and tow it down there, instead of having a trucking company do it!
Anyway, if you're really set to do it - and in addition to what Jeff wrote: make sure the car is empty, leave nothing - everything, like CD's, the manuals, spare tire (I'm serious!!!), should be out.
Also, together with the driver, and just before it rolls up on the trailer, make a very thorough survey of the car. Write down every nick, scratch, dent, all other irregularities (photos do help)and mileage. Have the driver countersign. It will be of some help when you get you car back and it doesn't really look as good as it did when it left...
Any chance you can put it in a container?
HTH and good luck
/F.