Cool, thanks for the clarification - I'll probably end up getting those expansions at some point.
We tend to play without farmers, especially when introducing the game to new players, as they're the trickiest element of the base game to get your head around and give an unfair advantage to experienced players.
I was in Powell's yesterday (awesome, huge bookshop here in Portland) and saw posters advertising a board game event being held there this Saturday - gonna try and sneak down there at some point, sounds awesome. There's also three or four proper board game stores in or around the city, which is cool - there are so few in the UK - I think there's only one left in London and it's a bugger to get to.