Silver Lake Crayfishing Restrictions?

Here at Silver Lake today. Saw several crayfish traps out already in the morning.
This afternoon I paddled around the lake a little and saw a guy in a power boat zooming around them, picking them up, and moving them. He almost fell out of his boat a couple times so I offered to help him move his traps. Well. He said they weren't his traps and was moving them be cause they were along the shore where the fish were and his daughter lost a fish which rapped around one of the ropes.
He told me they shouldn't be in the fishing holes. He said he saw a DFG boat collecting them all off the lake once.
I'm pretty sure he was just trying to justify what he was doing but I wanted to find out from others on this forum if this is the case.

-Keith