they'll crow when its light & when they feel like it .... regardless of how close another fella is!
They do seem to "answer" each other, but there can be a huge distance between them, so just house them wherever it the most convenient for you!
I find having them all in a "row" of houses is easier for feeding, cleaning etc, we have 5 chicken houses & a quail house in a kind of a row and a duck shed just round the corner! Some of them are empty ("nurseries") at the moment, but it works for me.
Just give them low ceilings at night, shut them in & black out the windows.
They'll still crow, but better than being outside at daybreak!
And yes, they'll crow in the day sometimes too - we joke that our legbar Jarvis Cock-eral sings for his supper...