Looks like lots of standing timber. You might be going a lil too fast over the cover cuz the trees look like they are leaning. As for the fish ID, I would turn it off and set your sensitivity and ping speed up to show clear arches, then you know its fish. On my old HB brushpiles could be mistaken for schools of fish. Learn to use that thing, they are the poo, I want one bad. Check out HB's forums dedicated to the HB SI. There is also a guy on the electronics section of CC that works for humminbird and can help.

BTW, were those taken at NOLIN?