If you think you need the ring system, why not just use a dedicated retrieval
line? It is going to be much more reliable and has other benefits.
Marking where your
anchor is can be beneficial in some anchorages, for other boaters who assume that a 1.5 : 1 scope is normal. Use a cheap but tough and brightly colored buoy; if folk want to run it over cos they can't see where they're going that's their issue. It also pays to mark it "not a mooring" or something similar, for certain other folk...
Pictures and more info:
www.rocna.com/kb/Buoyed_retrieval_line