Wilt wrote in post #18203925
Wind forces on umbrellas and softboxes
very rapidly mount up, to the point where sandbags are very rapidly overpowered, due to the leverage of the wind on the modifier amplified by the 'lever arm' of an extended light stand! And unless you enjoy moving lots of dead weight to/from the shooting location from the car, it is tiring and especially unrewarding in how quickly the dead weight is overpowered.
Yes, all true. Outside on a very gusty day, you likely won't want to use any modifiers at all, or perhaps just little dish reflectors.
You could try bringing an assistant, as long as they promise to keep their hand on the lightstand at all times, because as soon as they get distracted and let go, you'll get the strongest breeze of the day.