I'll be traveling with some in my friends whose mother came from Mull and would like suggestions for visiting this area from Glasglow
Mull is a ferry ride from the mainland town of Oban. The CalMac ferry docks at the town of Craignure.
www.calmac.co.uk/article/2165/Mull
There is some public bus service on Mull (including to Tobermory and Fionnphort), but you will need to check on whether it works for your particular destination and travel time. West Coast Motors has an app: www.westcoastmotors.co.uk/app][1]
You can travel from Glasgow to Oban by either train or bus. Neither is especially frequent.
Train schedules: www.nationalrail.co.uk/
Bus schedules: www.travelinescotland.com/
Demand for lodging on the west coast of Scotland and on the islands is very high, driving up rates. I recommend nailing something down ASAP.