does mctavish play wing?

Yeah, that's likely where he'll start. The Ducks typically start their prospects/rookies on the wings to ease the pressure. They did it with Zegras, Terry (who's now permanently a winger), Lundy, etc. Zegras was actually sent back to the AHL in his first go-around to play a handful of games at center.

Goucher making the team would be a massive surprise. I wouldn't go so far as say its impossible, but very unlikely.

He had an excellent presence at camp. My prediction is either Groulx or Gaucher. Maybe Perrault