I dry bamboo for arrows, so you might try my technique. Cut the bamboo fresh with about two feet on either side of the length you require. Try to heat it within two weeks of cutting it, if possible.
Next, take an acetylene torch, the hand held kind that cost about $10 at Home Depot and eavenly heat the entire length of the bamboo until untill it starts to sizzle and smell like cooked asparagus (try not to burn it). Let is sit over night. Then, the next day, heat it again until it turns light brown (again, try not to burn it). It should be a light, shiny brown color when you are done. Straighten it during the second heating with careful, light bending. You might have to poke holes in the nodes to prevent bursting (the overnight drying is meant to prevent the need for this)
A sturdy bamboo pole is a composite of split bamboo. However, a nice stick pole can be made from golden goddess, fishing pole, arrow, striped stem or any number of bamboos. Go to this website for a little more info in my subject area:
bambooarrow.com