Seen lots of them. If you look at your pictures I don't see anyone in "leather outfit" yes many riders wear black but again if you look in your pictures there are plenty wearing other than black.
Hotels were sold out early, very typical for any rally of that size, ROT in Austin is simiar. Nevertheless, if you want to see more that the RUB's go visit spots away from the main gathering, you will have much more fun
If you really want to have a good time get a motel now for Dawg's on Hawg's II in Lake Summerville the second weekend of November. You will see much less clothing there

Rooms sell out quick for that one too.