I don have much bandwidth. Can I just post thumbnail images that people click on to view the larger images?
No. Images must be displayed fully in each post. Members should not have to click on anything to view the images from within the post. Remember, this is an eye candy community providing instant gratification. To diminish the strain on your bandwidth you can either resize your images or sign up for another image host account. There are also relatively inexpensive web hosts that can be found with some research.