Welcome to the Nexus!
1 - It doesn't matter, the salt is non-reactive and only serves to increase the ionic strength of the solution and push more alkaloids into your non-polar solvent.
2 - No need to filter the bark out, you might even get a higher yield by leaving it in.
3 - Cyb's tek should work just fine. I tend to prefer simpler procedures anyway because they have less opportunities for you to mess up and lose some of your yield. I've used a simple no-heat STB extraction on ACRB with good results.
If you're feeling adventurous, you could try
adding dry ice to your NP solvent to clean up your extract and remove the NMT (up to 50% of a crude ACRB extract by weight). I've had very nice results with the addition of this simple step.