Campgrounds and RV parks near Union, OH

Union sits in Montgomery County just northwest of Dayton, placing renters within a short drive of both full-hookup RV resorts and Ohio State Park campgrounds. The surrounding Miami Valley is gently rolling farmland crossed by I-70 and I-75, which keeps most nearby campgrounds within 20 to 40 minutes of the city center. Closest to town, Dayton KOA Holiday in Brookville is the largest full-service option and the default choice for renters who want power, water, sewer, and a pool. Smaller private options like Oak & Ember Farms, Rye Camp, Green Valley RV Park, and The Graystone Ranch fill in shorter stays and quieter, more rural sites within roughly a half hour of Union. For state-park camping, Caesar Creek, John Bryan, and Buck Creek are the standard picks and all sit within an hour of Union. Each is booked through the Ohio Department of Natural Resources reservation system rather than the private parks' own sites.

Ohio State Park sites at Caesar Creek, John Bryan, and Buck Creek open for reservations up to six months in advance through reserveohio.com, and summer weekends around Memorial Day, July 4th, and Labor Day book up quickly after opening. Setting a calendar reminder for the six-month mark is the practical way to secure a holiday weekend. For private parks like Dayton KOA Holiday, two to four weeks ahead is usually enough outside peak weekends. Smaller private properties such as Oak & Ember Farms and Rye Camp are booked directly through their listing platforms and can sell out earlier because they have only a handful of sites. Before booking, have the RV's length, height, and slide count on hand so the reserved site actually fits the rig.