Trials will have a bearing, predominantly on maybe two or three positions and bench make up IMO. You are right with RTS definitely a lock in. There is zero chance AW doesn't pick him for round 1. I'm hoping it's at left wing and the signs are kind of pointing that way. I think some combinations or the position some players line up in will be up in the air. For example, CNK if fit, will be a lock in. What position he plays may be still to be determined - fullback, center, wing ...
Like I say majority of the team AW will already know in his mind and the remaining few positions will be up for grabs.