Aintright: An Idiot With A Gun

A retired peace officer and his wife traveling across the country in their new motorhome, make a planned stopped in a small Texas town nestled in the foothills of the Guadalupe Mountains not far from Mexico's border. Arriving in the late evening at an already closed RV park they follow the posted instructions for self check-in and settle in for the night. What happens next "Aintright."