I would recommend contacting BoatUS or checking their web site. I believe they have a list of reputable transporters and they would know who has a liability history. Do your homework and check references. There are excellent transporters out there. Good Luck!
I was looking for an old thread about this. A friend of mine had his boat moved up here from Tellico Lake & he raved about the guy that brought it up here. I posted his name & number in a thread where a guy asked about moving a wood boat here from Chesapeake Bay. I did find a few threads about this subject though.
I have *no* idea how good these guys are, or what their rates are. I just thought it was a pretty cool 5th wheel trailer that handles boats "From a 21' Searay to a 40' weighing 20,000 lbs" and they "pick up most boats without a hoist and deliver them without a hoist with the use of our Hydraulic Conolift Trailer", "anywhere in the US".