Before I started using Johnson quick release shroud adjusters (highly recommended if you do step regularily), this is what I did--a cut and paste from another old thread and describes putting mast up, but you may follow advice backwards:
I keep mast stays intact and don't undo them. Lift mast midway and walk to back of boat, spear mast into block, then walk it forward/upright. While holding mast upright with one hand, take
halyard in other hand. Send
halyard around the stays to the front. Hook
halyard to one of the front cleats. Tighten other end of halyard line (tight!) to mast cleat. Undo trailer winch hook from bow eyelet and attach to halyard hook and turn winch (while keeping tension on halyard line so mast doesn't fall backward) to bend the mast forward. Pin forstay/jib to roller furler. Unwinch halyard and hook winch back to bow eyelet (so boat doesn't float away when ramping it in).
Hope that helps!
Tim