David, There is a book on preparing art for shipping that was put together by a museum group. I have a copy at my shop and if I remember I will post the contact information about purchasing one. I believe they were $10.00 including shipping. If memory serves, the instructions made the assumption that you had some specialized tools and a healthy budget.
To the OP. Another service I use for shipping art and objects of value is Craters and Freighters. They provide white glove door to door service, though unlike a service like US Art, they don't have 2 security personnel and a dedicated climate controlled vehicle with the piece from pick up to drop off. C & F does handle the crating aspect, so you don't have to.