Somebody must have an idea what it is.
It says Hint: Plan to have a long weekend off at the end of April
The only thing I can think of is he actually did get the naming rights to Comerica Park and it will take effect on opening Day in April.
Since he's asking for an entire weekend, it could very well be the "Kid Rock Cruise"
Otherwise, maybe some kid of massive Concert event.
Orrrrrrr just perhaps a mega big Badass Beer commercial being filmed and he wants all his fans, or as many as possible to be in it as extras.
As many have alreaady suggested, could be one kick ass fan CD release party!
Hey, I'm just thinking outloud. And will keep adding your thoughts!
So, this must be what it is! And wouldn't you know! Kid is sitting next to a cooler full of Badass Beer chillin!
Soooooo we got it right! Congrats and let's party!