Yeah, what are "things like that?" As far as riding when wet is concerned, cover it. You can get free seat covers if you stay at a decent hotel, they are labeled "Shower Cap." Short of that, Target sells seat covers for a few dollars also under the misleading label, "Shower Cap." I bought more than one for under $5. If you want to go fancy, Brooks even sells one specially made for their seats. My seat even came with one, although the mislabeled shower cap goes on quicker.

Since we are in the touring forum, I'd bet you have fenders, which keep the rain off the bottom of the seat nicely. Simply sitting on the seat also does a nice job of protecting the seat.