Quoted By:
>> (...) by uploading and/or posting any User Content to the Services, you grant SmugMug a perpetual, nonexclusive and royalty-free right
One could make the images small and/or watermarking them rendering them useless to smugmug, at the same time provide unmarked and reasonably sized images on your own website.
Unless they have some sort of TOS against that?
Just a thought...