I know I've got snaps from the various WNBRs I've done that I haven't uploaded. For example, my Brighton 2014 album on Flickr contains 709 pictures but I took about 3000 or so. But quite a lot tend to be samey. I've considered in the past doing an 'official' album, with the photos cropped and tinkered with a little where necessary. And then uploading the the entire contents of the card elswhere, crap and all, for people to sift through and do with as they please
Only problem is that uploading around 20Gb of files would take a very long time with my slow connection.