We've been planning a trip with our bikes this weekend and of course now they're calling for rain. I'm hoping to not have to completely change our plans and looking at possibly riding in the rain, depending on how heavy it is. We got some rain gear, but I'm more concerned about the bikes. We don't have high end ones (mine has been referred to as a toy bike), but do want to make sure I do what I need for the bike. I quite like mine.

Is there anything I need to do to prepare the bikes for rain riding, things to do when we're finished? I'm mostly thinking of shifters, levers, drivetrain and handlebar tape. We'd also need to transport them on the back of our car, I was going to take the seatpost off so I don't have to completely readjust the saddle, but didn't know if I needed to be concerned about water in the tube if it rained in route.

Thanks