I've been here many times over 17 years. It's kind of funny because when I saw both The Eiger Sanction and On Her Majesty's Secret Service as a kid, this area was pretty much make believe to me. It was like it was Disneyland, but it wasn't a real place.
Further, my original motivation for coming here really had very little to do with the movies, other than minor footnotes about the geography. I thought "well, maybe I should go there, it looks cool and find out if any of it is actually real". When I got here the first time, I was blown away. I was like "holy shit, not only is it real, but there is so much more here that the movies DIDN'T show".
I've been here enough times now to where I know the ropes and know my way around very well. Even with all the other tourists, I feel very comfortable and laid back here. But, that's because I know how to avoid them to a great extent. The general rule is that you stay away from this entire area between our Memorial Day and our Labor Day. It's packed/overflowing and really isn't a pleasant vacation destination, other than the scenery. I suppose nothing unusual about any of that.