Anyone drive on unpaved roads?

I just have to get a new ride with good MPG since my current vehicle is in the under 20 MPG range.  Really considering a Clubman.  Will it survive the occasional (once or twice a week) 2-3 miles of unpaved roads I have to be on.  Mostly gravel and fairly smooth, but sometimes washboard sections.  Anyone have experience with a Mini on such roads?

I drive my 96 mini on gravel roads quite a bit.  They are washboarded.  The car seems to do fine.  Much better than my truck, but worse than my motorcycle.  No major problems in doing it.