The anchors we use are more akin to the "auger anchor" shown on this page:

http://tinyurl.com/cmwgn

Each boat has an anchor on either side that's shared with the neighboring boat. We tie them down over the tramp near the mast base. Most boats use the ratcheting tie-down straps, but some just use line. Most boats are on trailers, but some are not.

We've had a surplus of the anchors around our club forever, so I've never had to purchase one. However, I've assumed they can be obtained at a local mobile home dealer. (We've got lots of those in the southern U.S., but such housing is probably not practical in Canada!)

If I were preparing for serious wind exposure and/or long-term strorage, I'd drop the mast and strip the tramp as well.

Jerome Vaughan
Hobie 16 102614
Clinton, Mississippi