smugmug should be unlimted space but a limit on the bandwidth. it's high though so might as well be unlimtied. unfortunately smugmug is even more of a PITA to link for picture stories. you have to go to the photo, click share and then either copy the link you want (small, med or large) or click the link to the link and then copy and paste.
the easiest for picture stories is probably photobucket. you click on the link and it automatically copies it to the clipboard.