Transport only that which is necessary ...
personal items, electronics, etc., that can be removed from the boat, should be.
Transporters CANNOT be held responsible for damages from poorly secured personal items shipped in/on your boat, nor for other items, parts, etc., such as disassembled bridges, windshields, radar arches, antennas, towers, outriggers, dinghys or miscellaneous loose items, that have been improperly removed, protected, and/or secured.
Everything on the interior of the boat should be battened down securely
and all hatches, doors, etc., closed, secured, and locked.
Correct and complete preparation for transport is entirely the responsibility of the owner,
and/or any agent hired/assigned to perform such duties.
A Few Examples:
1) A canvas cover, or loose cushion, grill, deck chair, hatch door, etc., can be damaged, or do considerable damage, flapping or banging around loose in/with the forced winds and truck movements, which may be even more greatly magnified, if added to any naturally occurring winds, and/or other weather conditions encountered during transport.
2) If your bridge is removed, place it somewhere suitable on the boat and make certain it is safely secured. If it must be placed on our trailer, a frame should be prepared for it to rest upon. If your radar arch is removed, it should be secured against your boat.
You might consider using carpet to protect areas where surfaces may "touch".
3) Electronics such as radios, Loran Systems, etc., should be shipped separately or securely stowed in your cabin, with all cabin doors, windows, and any other access, locked.