Re: Mostly singlehanded...what lines should I run aft?
I'll second the suggestion for a "crewman in a can" (autopilot),
but for the type of sailing the OP typically does, running all lines aft will just be an inconvenient tangle of spaghetti.
My vang is run aft, and I've just run a jib downhaul for nasty weather. Jacklines get me to the mast, where my "pit" position is. Sometimes, the trip hazard of the spaghetti offsets the safety of running all lines to the cockpit.
S/V Old Shoes
1973 Pearson 30 #255