Another way RVers use dehumidifiers is when storing their RV. If they have power hookups during storage, this is a great way to keep your camper fresh and ready for the next trip. They are more effective than setting up Damprids around the camper. However, they do need to be checked and emptied periodically. Damprids and other moisture absorbers are great for mild moisture RV situations, but in extreme humidity, you'll definitely want to use an RV dehumidifier.