RalphLambrecht
Subscriber
Yellow filter. Do not overexpose or over develope.
Use a spotmeter on the sky and set exposure so it is no more than 2 stops above middle grey. You will probably under expose foreground under many conditions.
Then you think about two bath developers or overexpose and underdevelope to cut contrast.
Paper flashing in the darkroom will help to grey a white sky.
Grad filters or burning are a very last resort for me.
When in doubt, overexpose and underdevelop!