What is the main conflict in The River Why by David James Duncan?

A child of two proficient fishing parents, Augustine "Gus" Orviston is a fishing prodigy, catching his first large fish at the age of four and his first steelhead on a fly at the age of six. His mother, Ma, fishes only in the bait-and-hook style, while his father H20, fishes in the fly-fishing style. For this reason, Gus is proficient in both styles. However, instead of embracing the differences of their fishing styles, Gus is tormented by his parents' constant bickering and arguments over which style is best, including a constant interpretation of The Compleat Angler by Izaak Walton, a pivotal book in fishing and to the Orviston family.