Wolf, Man!
Update #2:
My camping neighbor is also a local (Ontario man) and after talking to him about the WOLF he's convinced it was a wolf too! He says Canadian coyotes are not that big. Now that I've got internet again and have reviewed some online pictures we're convinced we saw a Lone Wolf!!
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Quick Post. Just saw a huge wolf ... a WOLF! running through our campground! It was big! Tina yelled "Wolf!" I grabbed my camera and tried to take a video. He quickly dodged into the woods just as I got the camera going so you have to look hard into the woods about dead-center of the video in the dark area of the trees. If you look real heard, you might see an ear of the Wolf!
UPDATE:
Well, after talking to a few locals and park employee types they tell us that it was probably just a local coyote that has been hanging around. What!? I thought everything was bigger in Texas! This coyote was BIG! Bigger than any Texas coyotes I've seen. Maybe the locals just don't want to scare us away.... I think it was a wolf, man.