Well, right now the plunker hole is closed.
If you drive through the gates of bonneville, take a left and you'll see a "Tanner Creek Fish Hatchery" sign, keep going on that road, you'll cross a bridge into the "Tanner Creek Fishing Area". You can not fish at the mouth of the creek as of august 16, so you have to walk 400 yds downstream to the deadline. Im not sure you would want to plunk there though, cause pretty soon everyone will be casting spinners.