Hi Steve:
You didn't say what treatment you had - I went thru 6 weeks of radiation and 2 rounds of chemo. The radiation really knocked the bejeezus out of me. It was about 6 months before I started to feel "normal" again. Needed naps during the day and generally slept long hours at night.
A year is not unusual and a PA said to me that it took some patients as long as 2. Not to say that the fatigue doesn't start reversing - just that the energy level comes back slowly.
Keep an eye on your blood levels. At every followup with my oncologist, they took blood samples. Anemia is a risk with treatment.
Work on nutrition and especially hydration. Take it easy on exercise and give yourself time to make a comeback. You'll get better and your energy level will return. And remember that everyone is different - some get better in 4 months, some in 6, some longer. Some shorter.
As is sometimes said, your mileage may vary!
Best of health to you and wishing you a quick recovery!
- Jeff
PS - And no bear wrestling! They're just too darn big...