Our Family Invites Your Family to Hidden Valley RV Park, "A little piece of country in San Antonio." Hidden Valley RV Park, family-operated since 1973, is only 11 miles from downtown San Antonio and the perfect place to stay while you visit the city’s attractions or just relax by the Medio Creek and admire the foxes, deer, and birds that come to drink. Whether you want our full service digital detox RV sites, our more traditional sites WITH wifi or a primitive tent site, we've got you covered.