I think by the end of camp it looks like this:
Othmann-Wright-Guenther
Roy-Stankoven-Bedard
Bolduc-Fantilli-Ostapchuk
Kidney-Dean-Gaucher
Beck
Korchinski-Allan
Zellweger-Matier
Lambos-Del Mastro
Nause
Goalies who knows
If Clarke comes, I'm not sure how the D pairings look considering a couple of them play the best when they're moving the puck around (Clarke, Zellweger, Korchinski). Korchinski and Allan are most likely gonna be stuck to each other for a while, and Zellweger-Matier makes a ton of sense with their handness, size, and Hockey Canada experience. That leaves the question who does Clarke play with, and which combos get the most ice time? Maybe something like this, factoring in their past with the program, age, and abilities:
Zellweger-Matier
Del Mastro-Clarke
Korchinski-Allan
Lambos