This saddens me greatly.
In the late 1980s Greg came to Ellenville, NY to give a group of us a tandem tow clinic. We were using the ATOL truck tow system at the small airport in Ellenville. I'm not sure but after ground school I think I was the first to tow up with Greg.
Shortly after release at around 400 feet, a corn husk went by us - going up! Greg started circling and we gained out to about 3K AGL.

He showed me how to transition to allowing the student to take over control and a few other details. He was upbeat and smiling the whole time.
Then he said we should get back down to give equal time to the other clinic participants. To do so he took back control and started doing wing overs with the
BIG Bennett Dream we were using.

Together we weren't far from weighing 400 pounds so I was clutching Greg waiting for an LE to snap. Luckily the glider was stronger than I thought and we got down safely.
A couple minutes before final glide, Greg instructed me on how to go upright with the student. Have them move to behind you and "tell them to hug you like they love you." is how he put it. He tested me (now the pilot on final) by pushing me forward during landing approach. As instructed, I calmly repeated "Remember, hug me like you love me." and he stopped his "test". We had a good landing and the other guys went on to their turns as passengers AND pilots in control. It was a great and unforgettable day - because of the great person Greg DeWolf was.
Greg also liked and bought at least 3 of my PHOTO-PODs* to take with him during his
Fly America event. He deserves tons of credit for that idea alone!
I was also happy to see Greg at Dockweiler both in 2015 and 2016 at the Lilienthal meet. That was about 25 years after I'd seen him last and he was still teaching people to fly hang gliders!
A memorial plaque should be made up and placed somewhere (Dockweiler?) that briefly describes who he was and what he did. What he did was to allow hundreds - if not thousands - of human beings to experience flight!
* For those that don't know, the PHOTO-POD was a simple, light weight 35mm remote camera system I created. It was radio triggered and could take pictures from various places on your glider. Typically it would be mounted to the defined tip with the camera pointing in toward the pilot as well as the scenery beyond and below him/her. This was in the late 1980s and early 1990s. No digital cameras yet. But I could argue that the PHOTO-POD was the forerunner of the GoPro concept.