Split your logs in half, seal the ends and store them in the dry. After a month you can reduce the halves to staves. At any time you can reduce a stave to almost bow dimensions, seal the back and give it a month and begin tillering.
If you have knots try to get them down the center of the limb or add extra wood around them near the edge. Follow the grain of the wood.
The bark has already attached to the wood for this season. The growing season is over in most parts of the country. You will have to remove the bark carefully as to not violate the back ring under it. The bark will slip again next spring when the growing season begins.