CUCC uses the platform-portable Survex package - this has its own website and can be downloaded free. It also has a mailing list to keep you up to date with new releases and the like.
For more discussion on Cave Surveying, there is a specialist cave-surveying mailing list. Most of the discussion here is not at the beginning-surveyor level, however.
You might also like to join the Cave Surveying special interest group of the British Cave Research Association. This published (1993-2008) the quarterly Compass Points, which is also available on the web.