Teach me how to hunt steep creeks and drains

[RiverRoost]

Hunted some new ground this weekend that is mostly 6-700 ft ridges and every one falls off to creeks or drainages. Tips on how you hunt the ones that are roosted down in these drainage and creeks, roughly 150-200ft elevation change from the field edges. Get down in there with them and choose a"knoll" or ridge slope down to the drainage and hope they walk up that way? Most of this stuff was steep all around and couldn't tell any flat openings down in the creek/drainage flows where they would pitch down and hang around in. I hunt 100% flat ground where I'm from so this was a learning curve for me.