I've been struggling to create enough bare trees to cover my table for our upcoming Guilford Courthouse game (which I've described in the Work in Progress section of this forum). Here's a quick trick that I just discovered. If you have any access to Azalea bushes, have a look for the dead ends of their branches (the parts I was clipping off in my yard). You'll find that the tips make excellent bare trees for our scale, given the many, tiny branchings of the plant. I made a couple dozen of these quite quickly. Here's a photo of a few of them.

I've tried a lot of other "real plants" as sources for scale trees, but I think these are the best that I've stumbled upon.