I have decided! After much flip-flopping I've decided that I will run a fantasy game online to scratch that itch and keep Stars Without Number to the table-top. That also saves me from having to deal with meticulous, AD&D DMG style time keeping in my table-top game and frees me up to post more here.
I realized that time-keeping in an AD&D style SWN game is really problematic when the party traveled to a planet 2 hexes away. They were traveling in a spike drive-1 ship so it took 16 days (2 to reach the edge of the solar system, 6 for each hex, 2 to get back in to the next planet). Traveling from one edge of the sector to the other in a slow ship would suddenly add many weeks to one party's timeline. Now, strict time-keeping does not matter for most purposes, but part of the point of running a multi-party SWN campaign was to allow them all to influence the world equally, which is hard to do without time-keeping.