We have a "Ruberised Danforth Anchor", currently available from H2O Kyaks and others at £28+.
It is 1.5kg. Comes with caribina/clip, 7m of line, small marker float, stowage bag for the line.
It often sits in the stern-sheets (aft stowage) clipped to the limber-hole. Handy to grab and toss over the stern before running up onto a beach.
In use I've sensed that a length of chain should go on the wish-list.
You could trawl the forums (fora?) for advice or simply see the useful guidance on
Yachting Monthly.
Have a look at it when we meet at OGA Dart Regatta (unless you've alreaady gone ahead).
PW