I'm pretty sure Calfee's problems were from bamboo that wasn't thoroughly dried rather than the different coefficient of thermal expansion of the two materials.
Bamboo and wood both shrink as they dry and continue to do so for many cycles of gaining and losing moisture. The best solution is a prolonged period of unstable climate in order to force this process to happen.
James Wolf has a system of pumping moisture into an enclosed environment and then dropping the humidity repeatedly to ensure this happens.
I think Calfee was just speed drying and then smoking the bamboo which likely didn't allow it to reach its final minimum dimensions until it is already built into a frame.

I have used Manila rope that has been untwisted, washed/dried and separated into manageable hanks of material. Manila hemp(banana leaf) is very strong and looks very natural. Coconut fiber is another good one that is often available from garden centers.
Here's a view of the bb lug of my first frame using Manila.