If you knew the players who were missing out you should try and get them across with a promise of a regular game. The club there at might not like it but if they were in the same position they would probably do it to. Can only ask as I would rather play footy than run water..
the clubs will use a a "rotation" basis on players missing out on the reserves, so the player will run water, be the runner for a week or 2 during the season, player X is not going toing to another club for 1 week, the club will not allow it.