As it turns out, I solved the problem by using the following syntax:

{[[tabview]]}
{[[tab Name of Tab 1]]}
{[[gallery]]}
{: Name of image file 1}
{: Name of image file 2}
{: Name of image file 3}
{[[/gallery]]}
{[[/tab]]}
[[tab Name of Tab 2]]

{: Name of image file 4}
{: Name of image file 5}
{: Name of image file 6}
{[[/gallery]]}
{[[/tab]]}
{[[/tabview]]}

Et cetera, et cetera!

I think this will serve my purposes without slowing things down too much.

Yes - if you use different sources for the galleries : http://www.wikidot.com/doc:flickrgallery-module

( using different tags of flickr sorage - id's)

Yes - if you use the gallery not as a short - call ( as in the example page here) but with single image-source -definitions as in the description: http://www.wikidot.com/doc:wiki-syntax#toc25

NO: if you try to use the short form [[gallery]] there is no difference taken in the images of the page - all attached images are shown at this location of the gallery tag.

It would be goo to use any "include" page with a gallery tag with different attached images… but the include source is taken as it is and the images are not found if the pagename is not used ( like /pagename/image-name.jpg ).

NO: it is not a good idea to "overwhelm" any browser with lots of images - and only the first tab is shown at the beginnning of the download - the browser is loading and loading tons of images and nobody can see why in this moment - the other tabs are filled in the background.

"Tabs" mean - they are all incorporated at the one page and downloaded at the start of the page in one go.

And all images placed any where in the tabs too!

Allow users to comment?

Upload their own?

Link to a forum?