Anchoring in a swell or strong current is risky. This is no endorsement for anchors. If you're in conditions where you think it will be ok, use care!
Here's a link to a thread on a kayak anchor system I use on flat water with a buoy. You release the anchor with one hand by undoing line from a jam cleat while in the other hand you're holding the rod attached to a big fish on a screaming run. Chase fish, return to collect anchor later. Line can be run through the trolley ring
http://www.northwestkayakanglers.com...p?topic=2041.0
A length of chain, 2 to 3 feet, at the anchor, makes it lay down so the flukes bite better. However, chain should be attached directly to the bottom of the anchor, then tied to the top with a breakable line. That way if anchor gets hung, you can break the light line and pull from the other end.
It is not, IMO, a good idea to have an anchor line attached to the anchor by anything stronger than what you can break pulling from the surface. Better to lose an anchor than line, chain, etc., or worse, risk capsize or pulling the kayak under. If anything can possibly go wrong, it will at the worst possible time.