I like the Werner ladder idea but what about going up it with 50 pounds of ballast in my arms? I guess I could rig a pully system around a platform and hoist gear and supplies up to the deck via the dingy davit. I'm still not convinced I don't need to shell out for a rolling step ladder. This is the one I'm looking at: Used Warehouse Rolling Ladder 12 Step
Tommays suggestion was very helpful too. I will do that for fiberglassing the hull, sounds perfect!