I have worked plenty of Vine, but not doug. The following suggestions are for Vine and will prob work with Doug.
Cut only vertical or nearly vertical staves- Leaning trees tend to warp on drying.
Avoid cutting in Spring/ Summer for less checking.
When tillering, don't leave thick spots at the lumps, make the belly follow the back.
Avoid creating thin spots where the lumps transition back into straighter sections.
I'm still trying to figure out the best way/time to debark.