Could have used the buggers on the warmer winter days, but your lack of success is due to the large profile fly. Fish are very lazy in the winter...Midges from 18-24 are the target flies in winter...
As for opening day, large white zonkers is what im using...Those "freshly" stocked brookies will be creaming them...
Also, I would have planned your vacation week when bait season closes, and the hendricksons start to pop mid-end of april...Opening week is just a meat fest, nothing too exciting...