So...I'm doing an MS Ride this weekend, I'm (probably) taking my bike with the brooks saddle, and there's a significant chance of thunderstorms. I have a Brooks saddle cover, but I know it's not waterproof. I do not have fenders on the bike, but there will be a saddle bag to block some spray.

What do those of you who have Brooks saddles do when riding all day in the rain? Plastic grocery bag? Something else? Just don't want to trash the saddle

CA