I would say it's probably normal. If you were going to carry something like that across the country, how would you do it without damaging it? If you don't want to remove the rigging from the mast just notify the shipper that you wish to ship it as a single item in it's own 53' trailer. Or you could have it boxed in wood and shipped on a flat deck trailer. When you get the quote on either of those I expect you'll be looking for your socket set in short order. I'd advise that you secure everything inside as if for heavy weather, or worse, also. Anything exterior that could even remotely come adrift should be removed. Is the boat going to be shrink-wrapped or covered during shipping? If not, I'd be covering portholes. skylights, and other fragile hardware with tape and cardboard. It's winter and sand, salt, and 60 mph wind going down the road can sandblast things nicely. If it were my boat I'd sure want to see how everything was secured before it went down the road. I'd probably wrap the mast in kraft paper or something too and mark it all over-do not bend, fragile, aluminum, don't mar, don't drop, don't bend and anything else my fervid imagination could come up with.