Camp starts on July 3, but that's likely off-ice, which is why they don't have the ice booked.
There's a thread in the Back Burner forum on the camp invites who are known so far:
https://forum.calgarypuck.com/showthread.php?t=174576
It makes sense for there to be a thread in the main forum too.
Four players from Michigan State...
Mattson and Nodler are draft picks. Miller and Rosburg are invites.