can't help directly I'm afraid, but since diagnosis I've learned to to carry on running, cycling, rowing and yoga with the condition.
Firstly, no reason your shouldn't do Ice Hockey with T1.
1) let your coach know, let him know the hypo symptoms and how to respond
2) be prepared to test frequently, at least every half hour during training and playing to start with, until you've worked out how your body responds - I'm OK now to not test on runs of 10k or less, and test around every 45 minutes when cycling, every 5km on long runs, by trial and error
3) exercise timing - to start with, it may be an idea to try and make sure that you leave at least 2-3 hours after a QA mealtime dose (Novorapid etc) before you exercise to make sure the majority is out of your system. Still carry both quick and long acting carbs with you, at the rinkside and be prepared to eat little and often during trianing in response to your testing (I aim for BG >5.5 during exercise, others prefer higher)
4) dose adjustment - a bit trickier, and needs trial and error and discussion with a DSN. I'm now down to half basal rate and a single unit of novorapid if I'm going out for a long run or ride after breakfast, for shorter activities I only reduce the novorapid - Think Like a Pancreas is a great read and has some guidelines, as does
www.runsweet.com
5) be prepared for high sugars as well. With the stop start nature of ice hockey and short bursts of intense activity, adn the adrenaline of competition you may find that the liver releases glucose and puts your sugars up, I get this when racing. Keep testing, but be very careful about correction doses if at all - I don't, because
6) beware the delayed hypo - several hours later, as your body replenishes the glycogens in the muscles. blood glucose can drop. I get this very strongly after long rides/runs and need to cut back my novorapid for at least one meal afterwards as I also remain very insuiln sensitive for a while
7) don't forget to enjoy it.