One other step to those already mentioned. Turn on the air conditioner and turn the thermostat down far enough that the compressor runs as much as possible. It makes a great dehumidifier. When we had a flood in our house, the mitigation company turned our AC down to 60 to keep it running.
If you have any carpet, either pull it back to expose the pad and bottom or the carpet, or completely remove it. Pull any base trim you have in order to allow the water to evaporate.
Also, you might want to check with a company such as Servpro. They specialize in water clean up, and this might be the way to go if you have insurance. I'm not sure if they'll work on RVs, but it's worth a shot.