I don't have MAC and rarely bring up sputum and that probably impacted the answer I got. My doc and I decided my inhalers followed by Acapella (or Aerobika-he thinks they're equivalent) and huff coughs would be ok. It was a "gentle" hiking trip and that helps, too, if you'll be active.
My bigger issue there in first small villages was accessing distilled water for nasal rinsing if that's an issue.