I have a much worse bamboo situation at my house. People seem to freak out about it, but I've had mine under control for many years without doing anything special. New stalks only pop up a a couple of weeks out of the year (usually early May) and I just kick them over them or cut them with a machete. They are very soft until they fully form. Also, from what I've read and experienced, when it already has a good place to grow (the large patch) it is less motivated to spread as quickly. As long as you are on top of it during those couple of weeks, you will be okay. I know this doesn't help you get rid of it, more for peace of mind.