I have the Actives, which have zippers and velcro, not hooks.
Here are the instructions on how to put them on, along with a video.
For me, the first couple of times it was a two person job because the material was so snug that I needed a second pair of hands to keep the two sides of the zipper close enough to be zippered. Now that they have relaxed a bit, I can do it myself. Personally, I find it more difficult to get them on than it looks like in the video because I think mine fit more snugly than the ones in the video. But it is not difficult and takes less than 5 minutes to get them both on, including a quick brush of the leg before application.
I don’t think they will be easily trashed. Your biggest concern will be the zipper – if people try to force it, the zipper will break just like any other zipper. Also, I do wash them periodically to keep the zipper clean and easier to zip.
I wonder if maybe the ones with the hooks might be a better choice if you are concerned about barn staff not being careful. You could always call and talk to the company - they are super helpful.