Larry,
I don't want this to sound harsh, but you need to be aware of the harsh reality about this:
As long as you go with free photo hosting services, unpredictable disappearance of pictures, slow loads, and other issues, will remain likely possibilities. And when these issues occur, you will likely have very little recourse in dealing with those who have no financial nor contractual obligation to you, and owe you nothing.
In fact, there was a particular free photo hosting service (I'm forgetting the name, at the moment) that was widely used by most BF members, up until a couple of years ago, or so. Then, one day, everybody's pictures with that service disappeared.
Now we have broken links and red Xs everywhere throughout the archives.
History will probably repeat itself.
Mike