The Gulf Coast Bigfoot Reasearch Organization has tons of information about their research and sightings. Texas also has the Texas Bigfoot Research Conservancy, who's main goal is proving Bigfoot's existence with proven scientific research.
There's even a town called Bigfoot, Texas.
And last, but not least, I've written two stories for kids featuring Bigfoot, one picture book and one MG. But my Bigfoot is more of a fuzzy woodland creature. Think Harry from the movie Harry and the Henderson's. Here's a sketch I did last summer for my picture book.