Some think to get them up early so they can miss the BOP, others think to go late because the BOP will have had its fill for the day. I don't really think there is a good time, too many BOP and some may be late sleepers, but they'll be the ones hunting at night. Some may be fed up by night, but others will not have caught enough by then. I don't think there is a good time, just your luck since there are too many BOP.