I thought you had crew on this trip. I haven't done much single sailing except for the times the Admiral was seasick and I picked up the slack but I think I'd do what I said earlier. As Jon said "just do it" or was that Starsky or Hutch.
Hell with a radar perimeter zone and AIS you don't even need the egg timer as alarms will keep waking you up just as you're falling asleep. But then,, you know all of this.
Do you single-hand often?