If you want to dry it quick. I would rough it out but keep the limbs the full width for the entire lenght. Seal the back and ends really well with at least 3 coats of shellac. Then let it dry at room temp for a week or so. If you have a hot box I would then put it in the box and gradually raise the temp. Check the weight of the stave as it dries. Once it has stopped losing weight in big increments, it should be ready to work. You will know when you are floor tillering it. If it springs back it is probably good. Also the shavings will give you a good idea how dry it is.