Sorry to hear he is not recovered yet. I think I would keep him off the ice for now. You don't want to risk a fall. I guess if he is not feeling awful all the time, you should get him to stop doing things that affect him. Hope you can find someone close by. What about going to Calgary? Good places there, I hear.
Hang in there. You are good for your son because you know how he feels. I am sure he will be fine.
In terms of continuing hockey..I think that is a big question for you as a mother. He should not get another concussion and it is a high risk sport. Sigh. Still struggling with my 9 year old daughter's love of the game...I feel very conflicted....I am sure you do to. parenting!