Plastic bags are a life (and car) saver – bring a few ziploc bags and a trash bag with you. Whatever clothing you decide to keep after you change out of it will be wet, and probably still have some mud on it. Remember that you’re going to get back into your car when your done, and you don’t want to bring all of that mud into a clean vehicle. That’s what the trash bag is for! You might also consider something to put on your seat before you sit down.