Downriver Marina / Campground South Rockwood, Michigan (734) 379-2904 ProfileDownriver Marina / Campground. RV Park and Campground in South Rockwood, Michigan Photos RV Campground HQ Default Reviews Map Loading... No Records Found Sorry, no records were found. Please adjust your search criteria and try again. Maps failed to load Sorry, unable to load the Maps API. Enter your locationGet Directions Travel modeDrivingWalkingBicyclingPublic Transport Distance unitsMilesKilometers Get Directions