I'm Falkirk way, and the earliest train on a Sunday doesn't get to Stirling until about 10:20

I'll check the buses, as there's usually a pretty good service.
Sadly, my youth left me a long time ago, and I'd probably get mistaken for the caretaker if I turned up at a hostel

The first train from Glasgow on a Sunday doesn't get to Stirling until just after 10, so you may be a bit late as well...