I think it is best to organize your kits on your computer (and save theme regulary to an extern disk!) and from that maps put them in your Bridge.
When your computer crashes, you can get your organized maps back from your backup and then you have to do the Bridge again.
For me, I am now organizing my maps with digital material, so I can easely find that one little butterfly or that one background, without looking trough all the kits ;-)
I am writing this down in a manuel for Dutch people who would like to start with digital scrapping, organizing will be chapter 1.