Admittedly, we already tend to take the number planning a bit out of the game by initially turning them on the other side and you can only reveal the numbers to

Admittedly, we already tend to take the number planning a bit out of the game by initially turning them on the other side and you can only reveal the numbers to hexes you have built at (for the inital round of placing settlements/streets they are revealed after everyone has placed both). Makes for a nice variant where exploration holds surprises, or you can expand to hexes that are already known.