They had a very nice mix of warbirds from the area and are trying to expand things a bit this year with some new stuff like the B-25 "Miss Mitchell", which will be giving rides. Admission is $15 a car.
The Wing has created a new Facebook page and a Facebook event to help promote the fly-in. Their non-Facebook website is http://www.cafwi.org/. I will also try to post info here as details are confirmed!
From their FB event:
Come see vintage and modern military aircraft at the Gathering of Warbirds event on May 27, 2017. Korean War era and World War II era aircraft will be in the air over Waukesha and on the ground at the Waukesha County Airport.
This second annual Gathering of Warbirds is hosted by the Commemorative Air Force (CAF) Wisconsin Wing and will honor veterans and the 75th Anniversary of the Doolittle Raid on Tokyo, which was America’s first air strike to hit the Japanese home islands in World War II.
The Gathering of Warbirds is a family-friendly event featuring historic and modern military aircraft, aircraft tours and rides, and education activities for all ages. It’s for anyone who enjoys seeing historic and modern military aircraft and fighter jets fly throughout the day.
Aircraft presentations and tours will provide hands-on opportunities for families and aviation history buffs alike. Miss Mitchell, a restored B-25 Mitchell and the type of aircraft used in the Doolittle Raid, will be at the event and will offer tours and flight experiences.
The event will also honor veterans with a free hat presented to the first 200 veterans who attend. Entrance fee is $15 per vehicle. No pets or smoking on the grounds of the event.