.
I think using a Ziploc bag would be awkward. . Very awkward.
Just a regular plastic bag like the ones Walmart bags your items in for regular size gear, or a kitchen-size trash bag for long (500mm - 800mm) telephotos, would be much better choices than a Ziploc.
The free plastic bag approach is better than dedicated rain protection items, in my opinion, because you don't have to waste any time fitting them onto your gear - you just place it over the gear in a second or two instead of wasting a half minute with straps or velcro strips or whatever. . Even when it is windy, the plastic bags stay on the gear and don't tend to blow away, as one might think they would ..... all you gotta do is use common sense and tuck it around the gear properly - takes a half second. . So there really is no need for anything that mounts to the gear more securely.
.
"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".