As far as determining maturity of canes for harvesting for crafts, I was taught at a bamboo workshop years ago that new or first-year canes are bright green, and in the second year, just below each node, a ring of white wax forms. At year three and older this white ring ages to black or brown, indicating that cane is mature enough for harvest. There is a particular procedure for harvest and curing for maximum durability....cut them and let stand, supported by the other canes around them, until the leaves dry up. Then drag them down, cut roughly to length desired, and then submerge in water for a month. I've done this by tying the canes into bundles and making a raft, and then weighting the raft down with heavy things till the whole thing is held under, bamboo being hollow wants to float. This leaches the sugar and starch from the canes and makes them less attractive to insects and mold. After leaching, haul them out....split them right then if they are to be split....you could also split before leaching and they would leach quicker that way. For whole canes lay flat or stand up somewhere in the shade so they dry out slowly with minimal cracking. This process ensures maximum longevity in use; although even uncured bamboo worked green will often outlast other woody species of similar size. When joining bamboo, either split it and weave or else use fasteners that wrap around, like twine or wire, rather than anything that penetrates like nails or screws, which will often split it.
Bamboo leaves make excellent forage for all ruminants, and it is valuable for this as an evergreen. A patch of fenced bamboo surrounded by pasture will never get out of hand! The fear of running bamboos is overrated. All of the new shoots come up at a particular season, usually spring or (in the tropics) the beginning of rains. Gather these to eat, mow them, or just kick them over....after a few times it will be done for that year.