Uniform regulations for the Marine Corps prevent Marines from getting out of their vehicles in public, while in uniform. Sheetz with drive-thrus located near Marine Corps bases would be an extremely popular lunch destination. Also if there was a fuel service that provided a Sheetz employee to fill up your tank when you are not able to leave your car. Even if there were an up charge, this would still be a popular service. Specifically near MCAS Beaufort in South Carolina!