Fall summons river bass to a major feast before winter sets in. Fish feel the urge to feed heavily, storing energy for the long cold period when activity is minimal. To make the most of this bite, key on ambush points in tributary creeks and backwaters, where groups of bass feed. Water levels may be low, so pitch plastic worms or tube baits into the deeper ends of fallen trees or among clumps of grass growing off the bank. Rockpiles at the mouths of creeks also are high-percentage spots.