The first exhibition matches are a week away.Gavars is indeed in the training camp, as well as aforementioned Lavins and Skrastins. The overall list of players is just something. Not sure why you even start a training camp when theres like 1.5 players who can make the final roster. Maybe coaches need practice too? Anyways, the NCAA guys are the best there is at the moment, and they should have a good look in the nearest games.
And at least a third of them have a chance of making the cut, including the NCAA kids.
So you sort of gave an answer to your own question there.
If they wanted to take a look at the NCAA players, they would have had to do that early. Smart thinking and makes perfect sense.