You can parent the player to the ladder when enter the trigger and use iTween Move To and set Space to Self.
When game object part of the get child action is set to specify? Problem I have with that is in order for the players input to do anything(mouse look, character controller, FPS script controls), it has to be the parent. Odd, when I set space to self, the player went off the stage. Plus if I do use get child, I'm suspecting that one would have to create a global variable that contains an empty object?
set position wont move your character up vertically if you have your y axis frozen neither will add force. that is if you have a ridged body component attached to the character
Set position can't even be used for repositioning the player before a wait action is applied before transitioning into another state? The thing is I use Wait for each state dealing with movement to work at all. So, if I use rigidbody on the player that would help even though it has a character controller?