I singlehandle everywhere and when I want to pick up a mooring here's what I do:
Run a line from the bow cleat outside of everything to the cockpit
with about ten feet of extra length. Put on the safety
harness and clip to something in the cockpit
and position the mooring ball on the leeward side of the cockpit area, this allows you to control the throttle and shifter while maneuvering close to the mooring ball. Use your boat
hook to retrieve whatever is attached to the mooring ball, slip the line from the bow cleat thru the whatever and attach this line to the primary winch
is now attached to the mooring ball, and the line can be walked forward at your leisure.
Variations of this technique have worked in wind