One of the good ways to integrate flickr with wordpress is the wp-flickr plugin. In my opinion the best way integration for galleries is flickr mini galery.
But if you want to see all of your images in flickr from wordpress admin panel, the best way is WP-Flickr Plugin.
You will see all you photo sets from an html select.
I use “wp-flickr” and “flickr mini galery” plugins both. And I am very happy :)
you can download it here: