On the subject of a windsock or not, may I suggest the following.
When I set my strip up 3 years ago, I pondered the same question and initially decided against one, as I didn't fancy advertising myself to those in the air and the potential nimbys on the ground but not being able to get a "feel for the wind" without walking of the house and out onto the strip became tiresome.
The answer was found at a model aircraft display in the form of a small windsock about 2ft long and coloured red and white rather than hi-viz yellow or orange.
The benefit of it's colour and size were immediately apparent when I stuck it on top of the 15ft scaffold pole, I'd put up six months earlier. From the air it is hard to spot unless you know where it is and are looking for it.
From the ground, easily observed from my house and anywhere on the strip but low enough not to stand out on the horizon and the red and white surprisingly becomes indistinct from the background landscape when viewed from a distance.
I had to compromise a bit on it's location/height and the effects of wind gradients and shear caused by some local topography (the house and surrounding large trees and raised river bank adjacent to the strip) but I quickly realised how these obstacles effected the socks response to the wind direction from certain quarters and soon learned how to read the "sock" in these circumstances.
Good luck with your venture and hope the above helps.
Only downside is that being designed for use by model fliers and not 24/7 use it only lasts around 12 months but at £7, I'm not complaining.