I went on an overnight last summer with two companions, and one broke a drive side rear spoke causing the rim to rub on his brake, miles from anywhere as the sun was setting. Fortunately, I had a fiberfix spare spoke, and got his rear wheel back in shape in about 20 minutes. He rode on that spoke until we got home the next day. While it is true that you can often true a wheel with a broken spoke, If we had done that, it would have required a lot more work when we replaced the spoke. As it turned out, a couple of turns here and there were all that were necessary, and probably would have been even without breaking a spoke.