Or you can pick your flax at the gnome lands, there are some spots quite close to a bank too. For spinning the complete thing, i would suggest you start recipy for disaster and get banking acces to the chest in the lumbridge castle cellars. From there, spin on the second floor, in the room next to the duke. That is the closest spinning wheel to a bank at the moment. I made over 16k bowstrings there, to get to 66 crafting (forgot where i started, but that doesn't really matter).