Midnight Sun and Polar Night

[anotherfilthyape]

If you are travelling northwesterly while the sun sets and approaching places with midnight sun... Will you ever see the sun set? Once you arrive to a place with midnight sun, what is the longest time you will see the sun not setting? If you were instantly teleported to the antipodes of your location... Would you find yourself in a polar night? Would traveling in a southeasterly direction keep you in the polar night?

 

 

In general wikipedia does not answers these questions about the polar night and midnight sun... what can you say about them?