I love the two stadium double header. I got to do this in Chicago a few years ago. We went to Wrigley Field during the day and US Cellular at night. My buddy and I got interviewed outside Wrigley by the Harry Caray statue. The reporter said it is starting to become a rare occurrence for both Chicago teams to be in Chicago at the same time and have different start times. Article on Chicago Double Header
I've got plans to go to a two park DH this year, but the night game is a minor league Florida State League game. Day game in Tampa seeing the Rays play, and then a night game seeing the Tamps Yankees play.
I did also go to my first ever Day/Night double header this past Tuesday in Miami for the World Baseball Classic. That was a lot of fun as well.
Im probably going to try the New York DH with Mets and Yankees
I also do 2 stadium doubleheaders and more whenever possible. At the MLB level I have done Shea/Yankee twice and Cominsky/Miller once.
At other levels my favorite was my only 3 baseball game 2 city day. It was a noon double header in Omaha and a 7om game in Sioux city.
Actually I never saw Omaha milb without doing a doubleheader as my second visit was University of Nebraska followed by the storm chasers first game in their new park. I'll be back there again in June and will do another Storm chaser doubleheader. This time with the college world series.