Zurich to St Niklausen - Switzerland

[NreeK]

Hi there folks,
I'm headed to Switzerland in September for some study and this time I've decided to take my bike. The weather is amazing that time of year and I'd be crazy not to ride. I'll be there approx 2.5 weeks. I'll be in Zurich for a few days and my bike is the perfect choice to get around. I'll then spend a couple of days cycling to St Niklausen OW, which is past Sarnen. I'll spend about 2 weeks there. In my spare time I'll cycle the surrounding area. I've got a Specialised Sequoia Elite + bike packing setup.
I have a few questions for those in the know:
1. Am I able / where can I leave my bike bag at Zurich Airport?... and how much does it cost?
2. I've never used my phone overseas before other than on wifi, any recommendations on this? Do I buy a GPS instead? I'm totally ignorant on this front.
3. Any recommendations on where to cycle when staying in the Obwalden area?

Thanks to you all ahead of time
Cheers,
Rick

[Warin]

I would leave the bike bag at the first hotel you stay at. Stay at this same hotel before departure to pick up the bike bag then.

Do you use your phone now for navigation? If yes, then check that it is usable for navigation without the cell network active (set the phone into aeroplane or plane mode - this turns off the cell phone connection, ensure the GPS function is turned on). If that works (and it should) then all you need to do is get off line maps for the places you are going.

For local cell phone use .. you should be able to get a local sim card for a local telecom network and use that there. Much cheaper than using an ozie sim card there.