I agree with what was said before!
In the good ol' days when the Airbus rostering was done by Mr. Dat, by the way the most effective rostering person I met in my career so far
, we had travel days planned, even if those days were not part of our contracts. At least they are still flexible in respect to split, float or what ever you'd like to be done with you rotation days.
Regarding transport I used taxis most of the time. Was cheap, airconditioned and a bit safer than a bike. Main reason was that I am scared of riding a bike, so I never could have stayed longer in SGN, as you need to be bikeable.