Feet?

Questions for the gurus:

When shooting from un-even ground, how do the “pros” place their legs and feet?
Do you lock the downhill knee?
Does a more open stance work better when shooting uphill, etc.?

Yes, it is a serious question and I ask for serious, thoughtful answers.

Thanks for your time,
Konrad

 

I'm no expert but I find when the ground is more uneven that I put my legs closer together