You said that you are importing routes.
You didn't say whether or not you have installed the Tread app, and if you have, whether it is allowed to synch your routes.
If the answer is 'yes' you will see what I mean when you start your tour. And then, you will be pleased that you had your tracks.
At least take an SD card with a copy of the track on it. Just in case the inevitable happens.To add a little more detail, jfheath wrote: Typical symptoms ..
Route point names are likely to change,
shaping points will probably move onto faster roads.
Your route will not be the same as you planned.
I really hope that you will prove me wrong. I might learn something new from you when you come back.