I took my keel out last year to repair wear to trailing edge where it gets graunched against hull aperture when touching the bottom when under way. Not too difficult with a bit of preparation, but a bit of a handful to get it it off the decks and safely ashore.
I think I got some idea from the S26 handbook (available to members of the P & SSA). Basically, remove the top cover off keel case and de-rig uphaul. Use a halyard (spinny), or double up with genoa for added strength, to attach mainsheet tackle upside down about 2.5 metres above deck. Attach the lower block to the keel - I just shackled into the SS safety strops soft eye into keel top. I had a spare jammer block that I shackled to stemhead to take the fall from the tackles upper block. This gives a bit of forward pull to assist with the rake of the keel.
I managed OK single handed, taking it very carefully and slow, but would rather have extra "safe & reliable" hands to save having to regularly cleat/tie off while I checked all was clear and safe. Suggest old carpet finally, to protect surfaces when dragging over side-deck, and ideally some slitted plastic tube over toerail. BTW, I was afloat on mooring and lowered into tender, with some difficulty, and paddled ashore!!! Not ideal in any chop.
Once out, its a fair lift to handle even one end of the board without the help of the tackle or a fender as a roller, take it slow and sure, think ahead for next move and what could snag.
Good luck,
Phil.