I had a 42' Grand Banks trucked from Long Beach, California to Sturgeon Bay, Wisconsin about 10 years ago. The yard that did the disassembly did a supurb job and carefully documented their work in photographs so that the crew on the other end would be able to work quickly reassembling the boat. I had a wide variety of bids for the actual transport....ranging about 100% as I recall. I was lucky in that I found a qualifed boat truck/trailer on a "back haul", (the otherwise empty return leg of a delivery) so I saved a significant amount of money. Palmer Johnson yachts did the reassembly work, and did an equally impressive job. A survey will be required prior to transport, along with a special insurance adendum to your policy, (or a separate special transport policy), and a survey must be completed on arrival. These surveys are not the usual full survey, but are specific to the transport and will still utilize a qualified marine surveyor.
As a tip, you might look for the companies that deliver new boats from a manufacturer...they choose carefully, and they may have back haul legs available at a discount.
In my case, the trip took longer than planned, because as the boat enters each state the state highway or transportation department can require the driver to use a certain route (depending on weight and height restrictions). Some states will also require a follow up truck or driver depending on the load size.
My boat did arrive with some minor damage....apparently the driver drove under some trees at some point...at a motel or someplace, and the branches damaged wood trim on the flybridge....which was mounted over the aft deck on a special platform. The driver's insurance paid for the damage and repair without a problem...and Palmer Johnson did a beautiful job of repairing the damage....you could never tell it had happened.
My suggestion is to work with the larger brokers or new boat sales organizations in the area...they'll have good connections and know who does what well. After several phone calls you'll begin to develop a feel for what might work best for you. My broker in Long Beach, Phil Lupton of Stan Miller Yachts, was exceptionaly helpful and did much of the contact and planning work for me...and by the way....he earned his commission and did a great job. (There was no extra charge for all of the time consuming planning
work.)
Good Luck!
Dave