Note: an extra board may synergize very painfully with some Scenarios - most notably those which involve controlling / affecting territory, like The Great River, Despicable Theft, Ward the Shores and perhaps Powers Long Forgotten. If you want to avoid the extra Difficulty boost caused by this, you can opt to have some or all of the Scenario effects skip one board. (eg: The Great River could skip just Population Spills Across the River on one board, or all Rule Changes.) This will, of course, dilute the feel of the Scenario a bit.
(Discussion elsewhere) Tags: Extra Island Board, Powers Long Forgotten, Blitz, Second Wave, 3 more...