Is there a way to set default branding so I don't have to redo it for every album?

Yes — that's exactly what Album Defaults is for. Upload your photographer logo and your watermark image once, choose the default watermark behaviour and position, and every new album inherits them automatically. You can still override per album when a specific job calls for it, but the defaults mean a new album comes out already looking like you. One setup session, and you never think about it again until you rebrand.