Dayum.
You know...I was freakin' out on my drive home. Kept being conviced I was gonna go off the road until I got back to where I have driven about a thousand times. Twas dark and hard to see, though.
Anyways, I hope the guy is okay. Was anything broken, from what the Paramedics were saying? Also, Gettysburg area?
I don't think he would have much of a case against you, given the driving conditions and you being in your proper lane. Technically, pedestians do have right of way, but I think your extenuating circumstances should be enough to get you off in most cases. Also, the illegal intoxication (He was 20, right?) should play into your favor. The fact you weren't cited also help.
Much love, my brother. I've been in some bad ones too, and it's not been easy. But things look good for you.