I also play hockey 2 or 3 times a week and am in my 30's. Currently I'm doing HST, and it integrates excellently with hockey. HST is 3 full body workouts a week, at a progressive but typically less than 100% intensity. You are probably thinking your legs or back will be too fried to play hockey the next day, but with HST it's been the exact opposite. My current leg workout is 1 set of squats or deadlifts, 1 set SLDL, and one set barbell calf raises. Because the training frequency is high, I never suffer muscle soreness, and because the workload of each workout is low, my legs are not fatigued the next day. It's the opposite, I feel energized, and my game has gone up a notch because I feel stronger and better. When I was doing 1 muscle group a week, I felt like crap on the other hand, and had to avoid doing a workout a day or two before hockey.
Check it out at
http://www.hypertrophy-specific.com. The one thing you might want to modify if you are worried about getting too fatigued is dropping the last two weeks of 5's or negatives, as you can start feeling a bit burnt out managing that plus hockey.