I replaced my Anode three weeks ago after three seasons. There was a signicant amount of corrosion. Fortunately, I hadn't thrown it away yet. Tomorrow, I will get a friend with a digital camera to take a picture of it and post it here.
After looking at the extent of the corrosion, I'm going to replace it after two seasons.
Also, I stuck my finger in the drain hole after removing the anode and I could feel a lot of sandy grit on the bottom of the tank.
So, I hooked a garden hose to the city water input and turn on the water with the anode removed. This flushed a lot of the sediment from the tank.
I'm not sure if the sediment came from the campground water supplies or the corrosion of the anode or both. My hunch is both. ???