Question about bass fishing at night on Lake Hickory

[driftaway]

I fished a tournament saturday night with not even a bite. When we went to the scales there were bags of fish being weighed in. Have not done alot of night fishing. We used black spinner baits, top water, and buzz baits. We fished docks and rip rap banks but no bites. I noticed alot of boats sitting on the main lake and they were sitting there. They did not look like they were moving. Look like they were fishing one spot for hours at a time. Is this normal? What would they be fishing, and what baits would they be using?