I've been too cheap to buy any of the really nice windmill-style wind indicators; have used surveyor's tap stapled to simple wood stakes or tied around existing pipe fencelines, but am thinking a couple of windmills with tape tails would be a worthwhile addition when shooting 50-100yd smallbore stuff. I thought I had a good handle on reading wind back when I was still shooting high power leg matches, where you're not allowed any sighters, and where most of us were shooting AR15s at 200/300/600yds. But that was more than 20yrs ago, and shooting 40gr RNL bullets at sub-sonic velocity is quite a lot more challenging than shooting 69-80gr BTHP match bullets at 2800-2900fps...
ETA - Googling "indolence" is too much work....lol