Camille went in very tight and the center of destruction was not as large as most hurricanes. They mentioned that a lot in the days that followed the storm.
That picture you linked to was to the storm before it tightened up into a Category 5...when it hit it was much tighter. I remember watching TV coverage of the damage to hwy 90, and the areas that got scoured, but it wasn't a very big center of peak danage....
Interesting. I always saw the satellite pics and thought it was a big storm. I did a search after your post and read that the hurricane wind radius was just 45 miles at time of landfall. It does look though like Katrina and Camille were of similar size at the Katrina's current position in the Gulf.