It's done. It took less than a minute, all told. I combed and brushed my hair smooth. jonbaker sat in a chair behind me. I gave him the new barber scissors and he cut three inches - the wispy part - off my hair, straight across. I can still touch the ends when I reach in back. Future trims won't need to be so drastic, and maybe I'll spend some time dusting off ends.
BTW, goal is not 68" (I'm only 62 inches high myself!). I'm thinking more like 36" *tops*.