Yeah Marc...when we were there we caught it toward the end of the season..so we only saw a few people. It was very nice. And reaching the Keyhole and staring out from there was almost a spiritual experience. I will never forget standing there, braced against the rocks and hearing the freight train of wind roaring through that gap. The valley sprawled out below was just incredible. It was probably one of the most intimidating places I've ever stood...just awesome.
And Marc is right..there is no route-finding necessary for the Keyhole Route..the path is very nice and the destination from the Boulderfield up to the Keyhole is always visible..so even though there is no set path up there you always know where you are going. Once through the Keyhole you just have to keep an eye out for the "bullseyes" and you won't have any problem. The biggest concern I think is making sure you find the Narrows when coming back down the Homestretch...I guess it is possible to pass it and keep going downhill when you shouldn't..
You can find a description of our hike up Longs on our web-site..but the linked pictures are currently down (I'll put them back up soon..my image server was deleted..)...
http://home.carolina.rr.com/beachav8r/longs.htmlBeachAV8R