I'm going to say either BONDED professionals, or a local musical instrument shop that delivers such things. The second choice being the better of the two options - because they know damn well what is involved!

An ordinary moving company (BONDED OR NOT) would have zero clue how to deal with it - and would be making it up as they went.

People who deal with that specifically would be the best to get it there without damage.

Otherwise you might just as well heave it up on a trailer and hope the legs don't break, much less arrive far out of tune.