I've seen many articles about examples of that. CPR is a great idea, and there are a number of things that tournament organizers can do to prevent the "board-altering cheating", so it can be a good alternative to hauling fish around in a livewell.
They prefer rock/gravel, with some current or other action (like wind) to keeps the eggs oxygenated. They don't make beds though. That's why the lakes up here in Nebraska see the walleye spawn along the riprap dams.
OMG. They finally realized that. After I complained to them for MONTHS about how bad it was. And listening to them tell me... "We see no problems", or "We know it's bad, but there is nothing we can do about it". All depended on which phone-in tech support person I spoke to.