MM, I hope it doesn't come to that.
Minimum required headgear for all personnel in my V is a CVC helmet with ballistic-lens goggles. I actually shot a pair of those goggles with a .22 - left a gouge, but didn't penetrate, so I figure they'll deflect a rock, or a kamikaze dragonfly.
I also made a redneck windshield for the V out of plexiglass, wood, and metal. It attaches onto the front of the hatch opening with C-clamps. It's not real pretty, but it's only on there while I'm actually driving, so as my dad would have said - "You won't see that from a trotting horse". Takes about 2 minutes to put on.
The shield is tall enough to deflect the airflow up and over, taking bugs, etc. with it, but low enough that my sightline just clears the top, so I'm not looking through it except when ducking the odd pigeon-sized grasshopper here and there.
It also deflects the icy blast of winter air over you, rather than straight into your face. "You live in Texas!!" I hear you say. True, and we had winter on a Thursday last year, but on the few days it's cold, it can be quite wintery (it was 13* a couple of days in January). If you happen to be driving 40 miles into Austin at 0600 to do a parade, when the air temp is 28, that wind can make a compelling argument.
I have an original Cad-Gage hatch cover, but it is
not an easy on-off affair, and it's not worth the effort for the brief times I'd use it. It's basically a box with a sloped front, windshield glass on front, sides and back, metal top. Even has a wiper! But I have agreed to give that to another V owner who has coveted it for some time, and for whom winter/rain is a serious fact of life.
Cheers