I am in the same situation...ugh. My DD is finally brave enough to ride it on our trip next week. My H hates being wet, so I told her I would ride with her. I’m not excited, lol. If I wear a poncho (or maybe 2!) and a hat will I stay fairly dry? I also plan to have flip flops in the backpack to wear.
We went in September and did SM about 9:15. I wore a throwaway poncho! No shame! Pro Tip, put it on before you get in the log, or your backside will still get wet!!