Jay Honeck wrote:
I've seen a glider perform during the airshow, but never seen one "flown
in", as it were.

Gliders have the right of way over powered aircraft.
Let's say the Acme Glider Club decides to sponsor a group flyin to OSH.
They have a couple of tow planes to launch the 25 participants.
To make it to OSH from 25 miles away they need to break tow at say, 5000
AGL. It takes 15-20 minutes per glider. Three tow planes, 20 minutes
each, that's what... 9 gliders per hour. So it is going to take 3 hours
to launch all the gliders.
Let's say it takes each glider half an hour to fly the 25 miles to OSH.
To have sufficient lift, these flights must occur during the afternoon.
The airshow runs 3-5 pm.
Hmmm???
They must launch the last glider no later than 2 pm to allow for
deviations and recover before the airport is closed.
Keep in mind, you have all these people in powered aircraft converging
on RIPON, circling the lake, inbound from FISK, etc. And every 20
minutes, you are going to have to fit three gliders into the flow.
Also, you have the neophytes who are arriving for the first time and/or
those who never bothered to read the NOTAM.
As the Nationwide Insurance commercial says, "Life comes at you fast!"
Let us further suppose that those super OSH controllers do manage to
make it work. Now we have to move the gliders with their long wings out
of the way of the powered airplanes wanting to taxi in the grass.
Sure would be fun to watch!