I second this. Looking back, I would have shot more bulls by aggressively going in (timber) after them. To awnser the op’s question, I’ve only ever hunted region 4 elk opening week or the last week of season. We’ve shot elk during both time periods but generally speaking we’ve seen more bulls opening week. The area we’ve hunted more often does not have bulls bugling opening week, at least not during shooting light. While hunting an adjacent m.u. opening week, bulls were screaming regularly and I think this depends on hunting pressure.