Fall Bassin

I have a tournament comming up next sun. on a 1,000 acre lake in lower
southwest michigan. The lake has clear water, max. depth is 64 ft. has
some rocks, lots of weeds and nice flats. In the spring I can load the
boat on largemouth in one of the channels, before the spawn.
Later the flats and deep weed edges produce best. Where should I look
for fish at this time of year? does the water temp. make a big
difference.