The map in the first post shows the helicopter to be a ch-53. I just know it is much bigger than I expected. The paint is still good and the Coast Guard marking are still visible. 60 feet at Tenkiller is going to be dark and 8-10 feet visability is great by normal lake standards. 4-8 feet is standard. My first trip to the helicopter, I was swimming fast and following a bearing and figured I had missed it...I looked down and instead of mud, I saw flooring. There are several YouTube videos of the helicopter. This is one of the better ones.
As of September 2018, the bus was still there. (I'm sure it still is today) No tank yet that I know of. I'd love to see them float that out to sink it. I'd even ride it down!!!
By the way, Gene's Aquapro, a great scuba shop near the scuba park hosts the Lake Tenchiller Dive on January 1. If you're into shrinky dink diving, check it out. Unless Santa brings me a dry suit...I won't be there.
Merry Christmas,
Jay