How to assault a village with helicopters

[void1984]

Thank you for your deep reply.
I will check once again if any spotter planes are available in 1967.

I was given 3 light helicopters ideal for taking surprise hits.
I have 15 turns to take the village, so I can't afford to locate enemy's flaks first turn, wait 3 turns to fire at them, fly there in next 2 turns, because I will be too late.
I have to fly full range of 81mm mortar, over 3km, so I can't suppress the enemy all the way there blindly, I also use my artillery to lay smoke around Landing Zone.