Hey everyone. OP here. First and foremost, thanks for the opinions and advice. I figured I'd come back on here and let you all know how it went.
I came to the conclusion that I should in fact ask. As some mentioned, calling is not ideal, but considering they live 10 hours away, driving there and asking in person wasnt really an option. I have to admit, I was nervous as all hell last night before I called. I was hoping her Dad would answer, I could get right to the point, then be done. Of course that didnt happen. Her Mom answered and saw my name on the caller ID, and assumed something was wrong.
At this point I stated my intentions to her, and she was very happy. We ended up talking for about 5 minutes, but I still wanted to ask her Dad, so I asked to talk to him as well. It amounted to a real awkward 45 second conversation (consdering he already knew I was on the phone with his wife), but at the end he said he was real happy and that of course he'd give his blessing. Right before we hung up he said in a real stern Dad voice, "I REALLY appreciate the call". Whew, huge sigh of relief. I guess calling was the right move.
Thank you, oh wise Letsrun community, without you I mightve talked myself out of calling. So to any other guys out there, if her family is at all traditional, I'd recommend asking.
Now comes the 'real' part - I have to ask my girlfried...although for some reason I was 100 times more nervous to ask her parents than I will be to ask her.