I'm planning a 24 hour trip to see the A's on the road.  I'm thinking for a game against the White Sox in May.  Here's my itenerary:

Morning:  Fly out of Oakland to Chicago Midway
Afternoon: Do some touristy things in Chicago (Grant Park, Magnificent Mile...)
Night:  Go to ballgame.
After ballgame: Go to bars till' closing time.  Closing time is 4 AM, it won't be hard for us, because we're still adjusted to California time so it would be like going to the City and staying at the bars till' 2 AM.
4 AM next day: Go to airport, catch first flight to Oakland and sleep.

We won't even need to pack a change of clothes.

Why the White Sox?  Well:

It's the Midwest, not the East, flying time will be shorter and airfare will be less expensive.

Unlike the Yankees and Red Sox, I don't think the White Sox will sell out every game, even with a World Series championship.

Bars don't close till' 4AM, so we can go straight to the airport, so we negate any need to stay in a hotel.

This will be a 21+ trip.

Also feel free to use this thread to discuss spring training plans.