Well you'll be anchoring in small anchorages 50 or 60' deep at LOW tide. And the tide could rise 23'. What kind of scope will you be wanting at high tide? Looks to me like you'll be thinking of about 300' minimum. I lived there for some time and carried a 430' rode.
Part of the reasoning for that long rode is that I'm single engine and the anchor MAY keep us off the rocky beach when the engine quits.
But if you have all chain a long rode will mean a LOT of extra weight on the bow. I'd be thinking combination w about 25% chain. You'll need to use the rode splice to get it or a "reel" winch that takes shackles and everything.
If I said the more anchors the better my computer would snicker. I'm known for halving many anchors. I'd say two working anchors and a half weight to control swing or take to the beach ect.
This thread should be in the anchoring section and if you really want the answers to your questions there is VOLUMES in the archives.
North Western Washington State USA