Let me clarify the crane method mentioned above; the more common method (the one I used this fall) involves looping a line around the mid point of the mast to lift it with the crane, and then pulling the base down and attaching it. This obviously requires a crane height of half your mast height, which Washington marina doesn''t have.
The method I was trying to describe uses the crane hook simply as a fixed "sheave", so to speak, to run a haul-up line from the mast head through. The base of the mast is attached, and the mast is pivoted up from the horizontal by pulling on this "haulup" line that runs through the hook.
Hope that is understandable.