I use a climbers Harness and ascenders
I picked up a great Comfortable harness, and I use 2 ascenders... Its a little awkward but one you get it you can inch worm up like a pro. Great thing about a harness,,, its amost impossible to fall out of it,,,you can even hang upsidedown. I take an extra halyard and clip that also to my harness as a saftey, I climb up and my wife takes up the slack on the saftey, when Im up I use a saftey strap to tie off on the top of the mast..and my wife ties off the halyard .... then work away... I also use a colapsable bucket on a long line to pass things back and forth from deck.The ascenders work where you have 1 for your feet, the other is clipped to the harness.... On our foot section , we have nylon webbing that form a V, the top of the V is fitted with a scender and the to bottoms have loops for your feet....you stand on the loop, then slid the ascender on your waist up....then sit placing your weight onto the harness,,,, then slide the foot acender up...then stand,,,repeat repeat repeat...Another plus on harness vs, chair,,, if you need to swing out or work on the forstay, its alot more flexible.... we wont always be in a calm harbor when a haylard is lost.http://store.karstsports.com/harnesses.html