My biggest to date was 30 guys for my 30th birthday weekend. My hubby set it up for me as a b-day present. It was a blast! I was so exhausted by the end of it.
Yes I have driven nude many, many times. Love the feeling of being naked and the thrill of possibly being caught. I am nude as the passenger more though, especially on road trips.
I had a lot of gangbangs when I was in high school. Mostly unplanned at parties. But I loved every one of them. They were so much fun! After I got married we have had a few over the years.