Rams are taking Qantas A380 which has 14 First Class Seats, 70 Business Class Seats, 60 Premium Economy and the rest economy seats.
Unless Qantas is taking a special A380 Seat Config plan for the Rams to use.
So potential for all players to at least have a Lie Flat seat which are in First Class and Business Class.
With that, it could be possible to sleep on the plane. But with their big bodies, maybe even the Business Class Lie Flats could be too small and uncomfortable.
They will still have to balance the plane, so maybe staff and family take the back of the plane.