We have a few discussions and build alongs on PA.
A website is too technical for me so I rely on TG and PA.
I can answer questions for you if you have any. We have 3 native canes(bamboos) in the US, Hill cane(Arundaneria appalachiana), switch cane(A. tecta) and river cane (A. gigantia). Of the 3, hill cane makes the best arrows, switch cane which is similar to hill cane is second and river cane is 3rd. All 3 make good arrows, just some better than the others.
On PA in the build alongs a guy that goes by the name "Jackcrafty" makes Native American bows and arrows and I think he has one on using phragmites.
Patrick(Jackcrafty) is also an incredible flint knapper and has a series with knapping Q&As in every PA Magazine.