I put a lens hood on the camera today to minimize flare. I had the opportunity to walk around everybody and have the sun at my back but the composition I wanted was there, facing into the sun.
An old Rolleiflex I had took pictures with dramatic flare like you describe. A dreamy halo around bright spots. It had uncoated optics and heavy cleaning marks. I also get flare when I use my Ikonta. I don't know if you have to shoot Tessar lenses to get flare, but it seems like whenever I get flare, it's a Tessar.