Travel mode effect on fatigue recovery?

[CheerfullyInsane]

Correct.
As long as the unit isn't Disrupted, moves, fires or is fired upon, it'll recover fatigue.
Proximity to HQs is irrelevant as well, that only comes into play with Disruption recovery.

being "disrupted" does not prevent fatigue recovery. no mention of being disrupted in the rules.

Huh.....Could've sworn I've read that some where.
I stand corrected.

But in campaign games, fatigue-management becomes paramount. Not only does high fatigue lower the combat-effectiveness by itself, it also lowers morale which further erodes the combat-values.

Is it actually correct that lowering Morale 'erodes combat values'?  I thought the modifier was based on Quality not Morale.

Poorly phrased on my part.
What I meant was that not only does fatigue directly modify your assault/fire resolution, it also lowers the morale of the unit making it far less likely to stay undisrupted.
Probably shouldn't have used the phrase 'combat-values' though.