Curved Approach
I’m sorry but claiming car mileage because you have to carry your flight bag, head set and possibly an overnight bag won’t cut it. The tax law is quite specific that it is based on bulky tools of the trade etc that can’t be left at work.
Finally if you use the KM method of calculating “Work Related Car Expenses” you are limited to 5000 km per car per year and written evidence may not be required. You do though need to be able to justify how you came up with the dollar figure you have claimed. Lastly if your total deductions for “Work Related Expenses” is greater than $300 then you MUST keep written evidence for all the deduction, not just the ones over $300. In this case you MUST keep a car log book regardless if it is less than 5000 km.