I haven't actually looked at Walker's approach instructions in years, but they should still be good. The basics are to head due N out of North Sound, the current will set you slightly to the west. The trick is to not end up too far E as you approach the entry. If you've done the approach before you'll remember and be fine. Approach the waypoint/entry to the channel from the S or SW and follow the channel in. You would really only need to worry about following the approach if the channel markers were all blown away by a storm or something like that. In normal times and typical passage conditions, it's pretty straightforward.
It's not a difficult navigational challenge at this point. If you're on a Moorings boat, there should be a guide book on board and that's got all the info you need to safely get into the anchorage at Setting Point.
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