Stepping down Typhoon Mast ?

[trek47]

Hello Folks!! I hate to admit it, but all the years I have been sailing my TY I always had the boat taken out of the water by crane and professionally step down the mast. Can anyone tell if I could do it myself and what the procedure is and can it be done on the water on a calm day? I also have a bradley trailer for the boat and my other ? is how deep must the trailer sit in the water to get the boat on the trailer? I am tired of doing business with some of these yard owners because they basically have you by you now what. Thnx for any constructive info. Mich Myette