Just tonight I found out about this forum and found your message. Looks like you posted it quite a while ago, but I might be able to help out.
My grandpa was also in the 96th, I/383 (later on, K/393) at Okinawa.
After the war, a book was published by the Infantry Journal Press called "The Deadeyes: The Story of the 96th Infantry Division" which essentially gives a day by day account of the actions of the division from it's initial organization in Oregon in '42 to deactivation early in '46.
It has a list of all Deadeyes killed in action and I see your uncle listed under L/381 for Okinawa (you already knew that though, but I checked anyway).
The book is way out of print, but you might be able to find a copy through some sort of used book store, or perhaps at a library. I could also photocopy some of the pages and send them to you, particularly with regard to the events of June 10th.
There's also the 96th Infantry Division association which you probably have found out about by now (they probably told you about the book too). The url is: http://hometown.aol.com/infantry96/index.htmhttp://hometown.aol.com/infantry96/index.htm
You can also request his military record through the national archives. I sent in a request for my Grandpa's paperwork recently, so I'm not sure this actually works. They've had a number of fires over the years so the documents might have been lost. I've been told that requesting papers takes a long time, up to 2 years. You will need to fill out the sf180 form which can be found at: http://www.nara.gov/regional/mprsf180.htmlhttp://www.nara.gov/regional/mprsf180.html The form also gives the address of where to send it (someplace in MO).