That is pretty awesome!
If it were me, I might consider tying them into bundles of 10-15. In my experience bundling doesnt really affect drying time, but helps shafts to dry much straighter. I dont know if bamboo will warp, bend, or sag while drying. Also, having bundles it just easier to move around if needed.
As to the high RH, its pretty dry where I live, dont have much experience in that regard.