Note: The rules for fighting a camp say that it treats all of its edges as a front edge and it can fight once for each 1BW of its edge, with any free BW counting as a supporting file. (p100). I've seen people get this wrong.
So a camp hit on its "flank" actually fights with 2 dice, not a single dice. In fact, a camp could fight back with 10 dice (it would have to be mobile and contacted on all four of its edges...) 3 on each long edge and 2 on edge short edge. Now that would be some combat!
Richard