Hi, I'm wondering if the dock has been straightened out? It was displaced big time by the ice and the folks who maintain the lake were going to fix it.
They should be biting if they were there. How small were your jigs? Did you use maggots? I've been there often and no one is catching so it seemed there were no fish but my family was catching lots only because we use very tiny jigs and small bait.
Others had large jigs and big pieces of shrimp which the fish likely were nibbling at but could not get into their mouth.
Made all the difference in the world.
I'd like to pop a camera down just off they dock. That would make it clear if it was fish you saw or interference. Actually I bet you saw fish because there should be no significant weed growth or stuff growing in the lake this early in spring.