I just moved a 60 gallon. The trip was 6 hours long.
Looks like you have some good advice already, but this is what I did.
First of all I would do some water tests before you leave, that way after you set up the tank you can determine what the water quality is like. After you get the tank set up at your final locale, get the filter, ect.. running and take another test. You will for sure stir up every ounce of crud on the rocks and stuff.
So your test might turn up bad
You should be able to save all of your original water(if its anygood) and put right back in the tank.
I used a big rubbermade tub to transport the LR and most of the water.
I suggest getting your LFS to give or sell you some of their bags and transport them that way.
SWF.com ships there fish that way, right? So I am sure they will be fine untill you get your tank set up.
I am just a newb to the whole SW thing so I don't actually claim to know jack squat.
The number one thing I wish I would have done was test the water!! It might be worth it to just start your tank from scratch with new water instead of trying to fix water that is already crappy.
Good luck.