Drive-in Trailers: Road Tripping

It's been ages since we've had a drive-in trailer entry, so here goes. Next week (Halloween),
I'll be road-tripping with a couple of friends to a convention in Galveston. In honor of said trip,
let's explore the horrific events that might occur, if we take a detour, pick up a hitch-hiker, or decide to make a pit stop...

Note: The Manos one is a fan-made trailer...but it's so perfect...I had to include it.