While developing the story for Cars, members of the Pixar braintrust met with actual NASCAR fans. They came across an infield area dubbed Redneck Hill and met the real-life inspiration for Tow Mater. These RVs are partying in the Cars version of the original Redneck Hill.
To the far right of the photo, one of the RVs wears a painting of the Jackalope from Boundin', a 2003 Pixar short.
Image © Disney-Pixar