We have similiar terrain from rolling hills, to very steep hills. My opinion, much more productive setting up on a top and working the birds up to your postion. Can be very tough hunting bottoms, especially if they are narrow, and there is not much foilage out. Gobblers will us the height advantage if open enough to peer into your set from above. It can be done, but all must be spot on with no movement. Whereas on top you have a bit more room for error as they have to crest the top to see your position, and if done right, he's now in gun range.