If you are talking about Bay St Louis, then Bob will be pretty close to Kiln MS, home of Brett Farve, which used to be, I say used to be, a pilgrimage destination that for any true Wisconsinite.
Being just that, and my wife a HUGE Packer fan, we had to run over there after a few days in New Orleans. It was April 2006, and the entire Gulf Coast was still a beehive of activity after the destruction from Katrina.
We were surprised at how tiny Kiln was, but did find a drive-in to try, and it was very good. There is no indoor seating, so we ordered our burgers and sat at a picnic table under a shade tree.
It was a hot day, and after a bit a quite large (rotund) man came out, sweating, and sat down at a nearby table. He looked like he had to be the cook, so we started talking, and he was indeed the cook and owner.
We told him how good his burgers were (true), and I (from the North) said what a nice surprise it was to find both raw and fried onions on the burger. He looked confused for a second, then said, "Oh, you mean sautéed!"
And, of course, "fried" up here and down there mean very different things.
But Bob will have a nice place to park his rig, and it's close to the main highway. https://www.facebook.com/SnoPalace http://www.mapquest.com/maps?city=Bay%20St.%20Louis&state=MS
And now I claim the honor of being the first person to offer a suggestion.