Here’s the book that was mentioned in the comments thread on the Sweet Briar post. “The Preppy And The Trout” by Richard Reichardt was published (self-published?) in 2011. The synopsis reads:
Set in the glamorous resort town of Sun Valley/Ketchum, Idaho, the story revolves around a young, insecure, former lacrosse star who owns a fly-fishing shop, his demanding preppy wife, and a bungling older Ivy League man who’s recently moved west to escape his troubles by trout fishing.
It is currently available from Amazon in a kindle edition for $3.99. There is one review on the Amazon page, with the following observation:
In a very creative way, it shows the difference between east coast preps and those outside of New England.
A blog called The Preppy Times has an interview with the author here. — CC