Report:
I made the climb!
I did find the pink marker ribbons tied to the trees. However, I did not find anything that looked like a trail. Fortunately, the underbrush in the woods isn't that bad, so I just went up wherever I could find good footing. My first surprise is that from the base of Culps Hill to the top isn't much more than a tenth of a mile in horizontal distance. It is steep at places, especially the path that I took. In fact, I was on the right flank of the Confederates that charged the hill. I can understand why they climbed more to the left of me since the slope is not quite as steep. I was even to the right (left from their perspective) of the 66th Ohio, who flanked the charge. I finally appeared at the summit where the 76th NY tablet is placed. It took me only about 5 minutes to get back down the hill.
I've always seen Culps Hill as this forbidden cliff that seemed to almost drop menacingly down. However, after making the climb, it no longer takes on the dimensions that I had once imagined. On another occasion, I would like to try to ascend that hill more in the center of where the Rebs charged.