Sight fishing for Carp is not too easy, but it probably has to be the easiest way to catch Carp (which isn't easy). It would be pretty hard to not catch sight of one (they are a big fish, and all you really need to see is the shadow).
Joesnuffy,
What color was the San Juan? Red or Brown?
Have you ever fished with Floating Bread Crust? It is the best and most thrilling way to fish for Carp (besides the Fly Rod).