Barca's context is similar to New France, imo. Dwilight was a newly discovered continent with no native kingdom, populated by colonists from the old worlds. Barca was in one of the last edges of civilization, close to the only native nation and with shaky relations with them. A lot of woods. Small cities at most. Sponsored by more stable states.
It would be reasonnable to assume that the Barcan colonists (the general population at least, if not the nobles) would have adopted some aspects of Zuma culture, be it tools, food, clothing, or folklore. As the French did in America, especially with the «courreurs des bois».
That's also part of what inspired me for agricultural products. With all these untamed woodlands, there must be a lot of game. Hunting must be important. I imagine there being a lot of white-tail deer, possibly elk. And with all these forests, there must also be a lot of mushrooms. And with these winters, why not maple sap to turn into syrup? As for livestock, I'd figure that all of these untamed woods and Zuma lands must have a lot of predators in them. As such, it's much more likely to have large livestock, like cattle or yak, than smaller animals like sheep. I also imagine a more livestock-focused agriculture than vegetable-growing, as it needs less work to move cattle through the prairies than to plow lands that had never been cultivated. D'Haran honeybees would likely have been imported to be able to produce some sugar, and the bees would likely collect wildflower nectar from the prairies.
Now, I don't recall any actual Barcan RP about what they look like, but given all of the context, that's the general picture I give myself of Barca.