Interesting problem. I can't quite imagine why you'd remove all the halyards, I guess when you were packing up to move to a new village.
Suggestion 1 would be to use a cherry picker. This is something we do on a semi regular basis at my club. We someone needs to hire a unit they advertise the date in the Club weekly
email. Others who also want to take advantage of opportunity share costs. There are usually 4 or 5 people with a little job or two to do given the opportunity to use the unit for an hour or so. Splitting the costs up this way makes it a
cheap option.
Suggestion 2 is to use the boom of the travel
lift. Some
marinas will let you climb up and out on their travel
lift some wont. But you just glide
boat in as if being lifted out, secure
boat with lines, and operator positions travel lift where you can access the
mast top, climb and fix.
Some photos. This wont help the guy that posted the
halyard problem. But a local Club has a hand crane for members to do
mast work. It's as you'd expect right beside jetty. I have included some photos. Unfortunately I couldn't find any that show the unit being operated.
You'll see that the same Club hosted a bird weekend. This allowed people to don their best flying
equipment and proceed to fly from from a platform assembled by the crane. I thought you guys might have a chuckle. Needless to say a couple of the flyers weren't seen for hours given that they'd flown so far.