I don't think you'd want to spend time trying to entice bucks at last light. They could come in after shooting hours. Think about it, it's last light, you'd basically need them to run to you to get there before it was too dark. Random rattling, grunting n so to me is not the best approach, when you see a buck walking, searching, eyes down, lightly hit the grunt tube. Best is he's not sure where it came from. If he doesn't respond grunt slightly louder but not much. Once he looks in your direction do nothing. He may come but more often he'll begin to walk away again. Hit the tube again softly. Hopefully he picks up his head and looks again. He'll see nothing and your soft calling has allowed him nothing as far as exact location, but he'll have you pegged close enough. Very often he'll start towards you. Do not grunt again, don't snort wheeze, etc. that snort wheeze is reserved for situations we don't have in Jersey often. Don't be surprised if he flat out runs in either but don't expect that. Worse case scenario he walks away without being alerted by the nut in the tree trying everything in his power to change that bucks mind, too must n it's over. You also should not be doing the same things, same place more than once or twice.