If you want to see pictures of the local wrecks around here, I'd suggest you get a book called Wreck Valley, by Dan Berg. You can also check out their website:
Wreck Valley
As for how long before the wrecks start producing, I've heard that the following season you will catch fish. If the structure is in an area where there is surroudning structure (for example a wreck at or near Cholera) then the piece will start producing sooner.
Wreck Valley
As for how long before the wrecks start producing, I've heard that the following season you will catch fish. If the structure is in an area where there is surroudning structure (for example a wreck at or near Cholera) then the piece will start producing sooner.