Multiple/Random Header Photos

I created a new genealogy page/blog using the Twenty Eleven 1.3 theme. I see the option to use the stock photoS in a random fashion or upload my own photo. Is there a way to get the best of both worlds where I can upload four or five different photos that rotate at random? I am locating and cropping/resizing panoramic countryside photos from the represented countries of origin and would like to use multiple photos on the main pages headers. Can I do this and if so, how?