From what im aware of they go in for their final 'warm down' session, have a group meeting about the overall season etc
Then they are free to do what they like until 1st July, but within reason, as they are given a weight and body fat target to come back within.
Most of the squad tend to go away end of May (co inciding with half term school holidays for those with kids) for 2 or 3 weeks and indulge in a few beers, a kebab or 2 and why not, but as I say they have a target the club sets them to come back within
Those who will be being let go will have already been told