I've had good luck with dogwoods.They can sit in a tube for months and are still straight.Course mine sit straightened and bundled sometimes for well over a year before I make arrow shafts from them.I don't lose many arrows any more.
So far I've got multi flora rose,ocean spray,privet,dogwood,plum,bamboo,hill cane,sourwood,and hazel.There's still more shoot shaft material I hav'nt tried yet though.The plum,dogwood,hazel,and multi flora rose grows around me here.
That's a nice blog you put together.