The PRA (Popular Rotorcraft Association) convention is the week after Airventure, down at Mentone, Indiana, about 20 miles SE of Plymouth. Our confab following Airventure so close is probably the reason more of us don't make it to Oshkosh. Personally, I plan to attend and fly at Oshkosh on my Bensen.
Maybe I can start a thread on Rotaryforum.com and see if more of us swing-wingers can make the big dance. Our convention is real intimate, with maybe 3-400 people on the airfield or in the air around it at one time. It's a real family-like gathering, even though some of the egos are as big as you'll find at Oshkosh!
Look for Bensen 402RD down on the ultralight grass! I'll be the old, gray-haired, red-faced codger.
Maybe if Oshkosh had an egg-drop contest more of us would be there. We also have a contest to see who can fly the fastest figure 8!