I alreadyguessed that it was the wall directly behind Camp 4 in the Valley. Now I'm just waiting to see if I am right.
No ... but not too far away very very close. It's on half dome, I think it is called the Regular Route. You climb up that crack and then it becomes a chimney and you get into it. And the chimney arches over to the right and then becomes a little more easy. That is about three pitches I think to there. Then you go up the face and left straight across to those flakes and corners and some ledges good for two people. To get there with your haul bags should take a day. And from there you go pretty much straight up. Parties above can drop rocks on you at that point, I almost got hit with a football sized rock there that broke off part of the ledge.
I tried to rope solo it after succeeding on El Cap and I chickened out a few times. Feeling like I lost interest when I was really scared. I did not know how my mind was working, I managed to fool myself I guess. It is extremely silent there and very ... strange... in the shadows, "you can hear a pin drop
To be honest, I loved just walking up there and failing perhaps more then doing the climb. It took a few times before I found the perfect way to wind my way up straight up from the base, which is the fastest way. Very steep, and one false step from most any where will send you long ways down back to the bottom of some long slope. Not too much loose stuff though. You should do it.