Re: clumping bamboo
If you are in fairly tight spots, you could probably get a runner growing through the 1 side barrier method to make sure it doesn't go to that neighbor's side, but keeping the other side open will allow you to rhizome prune, and make sure it never gets crowded. Also growing a runner that doesn't make that many rhizomes or even shoot that much, but gain size such as Phyllostachys dulcis is pretty safe.
Their rhizomes grow within the first few inches of the soil, and often come out of the soil so they are pretty easy to locate thus making them pretty easy to control. I don't know about your area, but around here, I've been able to go bamboo hunting, trying to find houses with people growing bamboo in their yards, and then asking them for divisions, which is how I collected a few of my bamboos.
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