Some skydiver friends and I went there in the 80's and carried a sign "WILL JUMP FROM YOUR EXPERIMENTAL AIRPLANE OR HELO FOR FREE." We made three jumps that weekend. It was great!
I grew up n Neenah, about 12 miles from Oshkosh and was able to listen in to pilot communications on a radio my father had. I visited the event every year while he was alive and got rides from pilot buddies of his.
https://www.wbay.com/2024/08/07/ntsb-releases-preliminary-report-fatal-plane-crash-near-oshkosh/ https://lancair.com/wp-content/uploads/2019/10/LA_ES__web_f.pdf