Charlestown is a small seaside town whose beaches are considered by many to be the best kept secret in Rhode Island. Dump stations in this area can be found in parks and resorts.
Woonsocket is right on the border with Massachusetts. There's a free Rhode Island dump station in town and a couple of others southwest of the city toward Gloucester.
In Providence, which is the state capital, you'll have city life and abundant services awaiting. However, none of the Rhode Island dump stations are within Providence city limits; most are located in campgrounds and parks in sparsely populated areas just outside the city.
Newport City is a charming town set on the island of Aquidneck. The RV dump stations Rhode Island has in this area are located either on the outskirts of the city or in nearby cities.
As you can see from the list above, there are numerous RV dump stations in Rhode Island located throughout the state that will help make your trip much easier. If you're interested in free RV dump stations in Rhode Island, keep in mind that there aren't many dump stations in Rhode Island that are outright free. If you do find one, it's most likely located in a city wastewater treatment plant. Most of the RV dump station facilities in Rhode Island are found in RV parks and campgrounds and charge a fee if you're not a registered guest.