Apparently Oswego Marina can unstep your mast. Stepping after the canal is either a DIY operation at Castleton Boat Club, or full service
at nearby Hop-O-Nose Marina or Riverview Marine
Services at Catskill. It is possible to ship the mast but I don't see the need to do it; obviously it is easier if your mast is deck
stepped but even a longer keel-stepped mast can be carried. These locks are not particularly turbulent so control shouldn't be a problem if you are worried about the overhangs - I did the entire canal alone without any issues in the locks. The operators are very good and careful.
You can speed things up and probably save some money
if you make your deck supports for the mast in advance (some 2x6's, bolts, and carpet scraps are all you need). You will need a minimum of three supports, and more is better. The canal is pretty calm, but Lake Oneida can be rough and power boats on the Hudson
can kick up a wake. After the mast is unstepped and lashed down it will still take several hours to coil and stow all of the rigging
. Plan for even more time to re-rig on the other end. You can mark your supports and leave them at Castleton but no guarantees they will be there when you return - materials are constantly scrounged and reused for multiple transits by many boats. Perhaps the commercial
folks will store them for you (with some confidence they will be there in a few years).
is of Carina at Waterford (where the canal branches off the Hudson). The first lock is visible on the right, the Mohawk river on the left. You may notice that I used an X brace aft and a small saddle on the pulpit, with lashing in the middle; if I ever do this again there will be at least a strong support in the middle as well. Also, I would not rely on the pulpit to carry the load.