ok, so this might be a weird way of implementing something like this, but here goes...
i have a set of photos from our trip to Italy a couple years ago. i've processed the set and have my final set of images. however, there are certain images which i dont want to be visible to the general public, but would like friends and family to see. so i'd quite like to have two 'versions' of the same album - one for non-logged in users and an expanded one for logged-in people (or people who've provided a password, etc). having some sort of notification that there are private images to see when not authenticated would be a nice addition.
so, for example:
Italy (200 Images) - this is the public version, the version people will see if they have not authenticated. Contains 200 images which are suitable for public consumption.
Italy (207 Images) - this is the family version, with 7 extra shots of us which are somewhat private. Contains the 200 images above, plus 7 extra.
I've been mulling over how to do this sort of thing with dynamic albums or something, but im a bit stumped
ideas / thoughts / abuse?