GMMAT
I have and excelsior bale in the backyard we shoot at (me, my hunting buddies, our girlfriends, my brother, their brothers, the neighbor kids, you get the picture. it gets used a lot). I found a bowed piece of plywood I use for a roof. I put 4 eye-bolts in the wood base of the stand, and 4 in the corners of the plwywood and use 4 bungies to hold it down.
The target had a built on roof, but after replacing it 5 or 6 times after the wind blew it off and busted it, i went with the plywood and bungies.
OkKeith