Thank you Bob & Andrew. You guys are some Sierra veterans and I really appreciate it.
Bob, I found the crash debris at the bottom of the cirque on the northwest side. Most of it was very well preserved including seat cushions, wings, doors etc. I researched the tail number (N231EY). According to this site it was a Mooney that crashed on Feb. 18th, 1980. I found an obituary from the August issue of Physics Today, "Robert V. Pole. The physics community lost one of its most creative thinkers and one of its finest people when Robert Pole's private plane crashed in a snow storm in the Sierra Nevada mountains on 16 February 1980". The dates aren't an exact match, but I think there may have been some delay in the report on the locator database. There is more information online confirming that there was just one person on the plane. It must have been a bad storm because I remember reading about one or two other crashes from the same time period along the Sierra crest. There is a photo of the debris somewhere on summitpost. If you are interested I took a few videos. I can post them on youtube.
Andrew, I think I saw your photo from that same camp spot below the Sierra Crest! We were surprised to see a comfortable sandy beach to sleep on.