At closer inspection of the pole I noticed some teeth marks on it... I can't preview the images from the Bushnell on my digital camera and I don't have the Bushnell Trophy Cam model with a built in viewer, so I rushed home to download the images to my computer. The SD card was full and I thought maybe I had some pictures of the culprit, but it might have filled up with warm leaves before the terrifying event.
I got home and scanned through the pictures. I was surprised to find a new species, but more about that next time. And then, the culprits showed themselves: two porcupines!