I keep a pair of inexpensive flip flops in my
Loungefly backpack (I found very lightweight
Crocs at Marshall's for $14.99). If rain is coming, I take off my sneakers and socks, put them in a flimsy plastic grocery bag, and wear the Crocs until the rain and puddles clear. I bought the shoe covers a few years ago and did not like them, they were difficult to put on and if the rain backs up (like it tends to at Disney), the puddles were deeper than what the shoe covers covered! My flip flops weigh less, too!