My mental image of my seat position changes when I'm going uphill on the unicycle compared to when I'm going downhill. I was at the cemetery today doing hills and having some luck on pitches that were trouble before. Well in truth they are still trouble, but at least I've had a bit of success. What I noticed was that it felt like I was having more luck going uphill when I made sure my butt was right under me, hips rotated forward. Also, it helps if I really focus on keeping a rhythmic pumping of my thighs up the hill. It is soooo easy to stall and fall on steep grades, and my defense is to keep a rhythm.
Going down the hill I felt like I did better when I rotated my hips back so that the seat was behind me just a bit. That way I seemed to have a more effective angle of breaking on the pedal upswing. It felt like I could engage the braking a bit earlier so that the crank rotation was just a bit smoother.
So there you have it. Rotate the hips forward and keep a strong rhythm up the hill, rotate back and smooth out the breaking action going down.
At least that's how it feels.