I've read some posts from people who share your fear, though can't find them right now.
Last year, I had a porcupine walk into my camp at night while I was cooking dinner - he just walked right up, five feet from me. I jumped up and was flailing and waving my arms, shining my headlamp at him. He ran off and settled about 100 feet away. I could see his beady red eyes staring at me for a couple of hours. Had a hard time getting to sleep that night. I still have nightmares about that porcupine.
Hiking out in the morning, I met the porcupine on the trail less than a few hundred yards from my campsite. I chased him up a tree just to exact some revenge.