If you commute from Johnson City that is on US281 expect heavy traffic to downtown from early am to mid morning and again the reverse in the afternoon starting around 3PM. Since most of the places of interest are in the center of the city(Alamo, Riverwalk, El Mercado) and south of downtown (Missions, bike trails), IMO I recommend staying closer to downtown. I live here so I don't have much experience in picking an appropriate RV Park. Have a great trip.