I think I hiked up Mt. Storm King when I went on a class trip to Olympic Park in middle school. All I remember is that walking uphill for so long was hell on my asthma.
Theobromine poisoning is rarely fatal, and milk chocolate contains almost none. At worst you probably gave some birds the shits. Awesome pics, and I'm sure it is really satisfying to push yourself in a way you didn't know you could.