The fishing world is crying out for a "how to fish BI" book. The memoir part is fun and adds interest.....but unless you have major literary skill stories alone quickly sound the same. I find it incredibly frustrating to hear story after story about ancient blitzes without some factual information that gives me a realistic hope of being able to fish the same water. Trying to redo Zane Grey would be a mistake. Write about what you know and love, write simply and try to make what you say helpful rather than embellished entertainment and I think you'll find an eager audience.
DZ, I remember a recent post of yours which described how you set out finding fish with plugs and only then switch to eels was worthy of the book. Believe it or not,people may value some anecdotes or how-to you can feel comfortable revealing.