I heard it might be a few years for Pella. I did see that they have some heavy equipment in the parking lot and are just starting to clean up debris. Fishing is not that great there, so I wouldn't worry about it either way. I've moved on to other places and have been doing better.
From what I was told, most of the ones next to the rivers are closed but lots should open in the summer at some point. Best way I have found is to call the county that they are in and have gotten some better info that way. Websites have some info on that too, but not always clear.