the likelihood that you get hail that is capable of damaging pretty robust fabric is incredibly unlikely, and will start damaging other things. So you really only need to protect against the most common types of hail.

Yeah, might want a metal grating/mesh or something instead. Should do better in the wind.

Hardware cloth is metal mesh, so any wind strong enough to remove it would have long since destroyed the panel it was attached to thanks to the surface area of the panel. The standoffs would probably need to be “L” tabs or similar arranged in a grid across the face of the panel. Heck, just erecting a screen over the entire field would probably be better and cheaper than doing individual panels, but a field-size cover would probably end up with needing higher strength posts to mount it because of the greater drag over surface area. That said, I’m not an engineer, so the most efficient and effective method of protection is going to have to come from someone with more knowledge than my guesswork.