How can you put these guys down for getting of there butts and volunteering for a fish enhancement project? Netting fish for broodstock sounds difficult. A gillnet is definetely not a good choice because of the other kinds of fish that would be killed.
Chasing fish around the river with a dipnet does not sound very productive. If there were more than three volunteers a beach seine might be dragged out in the river depending on flows.
I hate to see snagging on our rivers as much as anybody but it may be a good way to collect broodstock for new projects in certain areas.