I have a Members Area category. I currently have the 3 forums in this set as teaser forums for guests with no last topic displayed. Is it possible to just show the category heading for this section and not display the actual forums within, just to highlight the fact that it's there but not what it contains?

so a teaser category ?

Exactly.

Currently, if I make all the forums in that category only visible to members the category is not visible at all to guests so they don't know that it exists.