I thought about turning it over but a number of reasons come to mind why that wouldn't work. Two main ones would be that this is a channel so there is often lots of traffic and the other is family that don't necessarily want to get wet.
I could try to fly a hull through, it might clear but that is WAY iffy... although it would be WAY cool
My terminology is not up to par yet but what about hanging a pully off of the lower jib connection (bridle?) and running a cord to the jib cable (forestay?) and run that through the pulley then back to the deck to let the mast down...I know I cannot lower it all the way as the leverage would be too great. But to drop it to allow the couple of feet clearance then yank it back up and reconnect the jib cable. If I found it too hard I could always add another pulley, make it a 2:1 and be less likely to be overburdened and drop it accidentally, maybe mount a cleat somewhere just for this purpose for safety.
Actually, this sounds like the makings of a two step solo mast stepping plan without using a winch but I don't know about doing it on the water without already having the connections in place, although I have some ideas about that too. I can easily have dock access on either side of the bridge so I am not totally euchred.
Hmmm.... any other thoughts?
Jeff.