You could probably buy a new one for not too much more than what it would cost to make a box or pay a UPS or FedEx store. You could then use the box for your seasoned precious one and take your time seasoning the new one and have a spare. As you know, you can never have too many Webers.
Another way to look at it is when you consider the value of your time and the dollars spent on hotels, airline tickets, meals, meat, entry fees, etc, whats a couple of hundred spent on another 14", especially if you can get one on a special. Plus you would also end up with a spare.
Edit: If you did not want or need a spare 14", you could assemble it and sell it on Craigslist for near or as much as you paid for it, especially if you threw in a couple of bottles of your or Harry's rub. I am sure there is someone out there who would appreciate buying a new assembled 14" from a famous pitmaster. I would love to be able to say, "Wow, I got my WSM from Donna Fong".
Or, call the Weber marketing dept (not sales). You may know someone there and if not, they probably know who you are. With all of the promotion and free advertising you give Weber, they may even ship a box and packaging material to you.