Having suggested, in my usual oh so low key and gentle way, that it would be a good idea to unstep your mast when laying up your boat, I'm thinking that the very least I can do as a follow-up is share some of the things I have learned while unstepping a 75' mast some 15 times over the last 23 years.
I'm going to start with tips to help you select a yard to unstep your mast and then move on to stuff that will make things run smoothly on the big day.