if you want to go smaller but still want to be able to handle the
ultimate storm,
tandem up 2 anchors: lay a danforth with 35 ft of chain, attach the
other end
of the chain to the head of a CQR, lay the CQR.
In addition to the "you can have anchors too big", you also can't have
too many
anchors. Fortresses are great for this duty (their light, come apart,
easily stowable).
Tom