I was there about 3 weeks ago on a sunday and bonneville hatchery dropped off a bunch of lunkers in there. I was using a gold spoon from my float tube. Me and my buddy got our limit in less than 1/2 an hour. After that it was catch and release. I was there a week later and nothing was biting, even though it was supposedly stocked with 4000. I went over to the other side ( Hartman Pond) and caught my limit.
Once you have kept the daily bag limit, it is then illegal to continue to fish. It does not matter how you caught them (bait vs. lure).
If the limit is 5, but you have kept only 4...then, you can continue to fish. But, as soon as you've kept fish #5; the reg's clearly say you must then stop fishing.
You cannot continue to "only" catch and release, past the fifth kept fish. That is still illegal. It is all determined by how many fish you have kept and are in your possession (ODFW uses the word "retained").
You'll find the actual law on pg. 8, line item #14 under General Statewide Regulations...in the 2010 reg book.