Many years ago, I've had it happen in Tillamook Bay. There was a huge, grizzled old sea lion that used to hang out by the Old Coast Guard Station and brutalize traps.
I've had seals get into them at Nehalem, but seals aren't nearly as destructive as their larger cousins. And it seems they don't want much to do with poultry.
My personal belief is that bait doesn't matter much. I will say that I've done the best with chicken that wasn't refrigerated for a few days (but it's nasty). I think it's a matter of what disperses the best, casting scent the farthest. I think anyone who thinks that crabs are picky eaters needs to rethink their strategy.