Shooting with film in lower light situations is a little tough. I typically don't use more then ISO 400 and even right before sunset, the light you still have can lead to pretty slow shutter speeds.
But even though it is not a whole lot of light, it is the prettiest light you can get from the sun. Even before you start with backlight and the sun being right behind your subject.
Lensflare was pretty awesome, especially on the medium format, my Kowa Six. The sharpness is pretty amazing once you nail it.