I forgot to mention the last part of the above story: when I took off the next morning, as I did not have the means to re-erect the windsock, I bunched it up and put a big rock on it. No info isn't a problem, eyeballing ground speed and using the GPS, besides just generally paying more attention, would have made it a non event. But I just sat there fat, dumb, and happy 'cause I KNEW what the wind was doing....or so I thought.
The hang glider and paraglider pilots have some pretty slick ways to determine wind direction on landing also, involving dropping flagged (survey tape) weights (small rock) and seeing what direction the tape lies out in upon touchdown, this involves keeping an eye on it of course, which has to add to the workload.
Tom Simko