Yes, tipping is generally expected.
I reckon it's a judgment call. This is a cultural thing because some staff are paid so poorly. A bus driver could make a heap in cash tips (tax free) so I reckon a small tip or nothing. A small group or one on one tour a tip could be appropriate of they're worth it.
Yes.
If you feel that went above and beyond thing yes tip them if you feel they were only doing their job no
Entirely up to you
Yes, if you want to
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