All of the things we plan for and dream of in our downtime — the river conditions, access points and locations on maps, the hatches that should be, the expectations of success — all of it is variable. It all can and will change. Truthfully, the variations — that randomness — is the heartbeat of fly fishing. It’s the essence of the allure. The unpredictability is the draw. Adapting to the day-to-day river conditions and meeting the trout on their own terms is half the fun in all this. Plan, but plan broadly and expect the unexpected.