Chloe wrote:

I'm in Zone 5 and am wondering about planting bamboo to form a natural
barrier of 10 to 12 feet in length on one side of my property. The location
is already shaded and has heavy clay soil. Will bamboo grow there, and how
much do I need to plant in order to have a thick, visually screening stand
of it? Is its reputation as an invasive plant something to be concerned
about in these circumstances?

I've seen some television shows which planted non-invasive varieties of bamboo
as a screening element. I don't know what the varieties were, or if they would
do well in your zone, but it's something to investigate.