metal gear solid 3 question about Ga-Ko camo?

does the gako camo make the little toy frogs croak when you pass them or are near them and when you are closer they are louder and how far is Chyornyj Prud because that is were the camo is located at is it like 3 pieces in or like 50 or how many levels do you have to go to get there also how many times do you have to shoot the frogs and can you just leave a level and then reshoot the same one over and over again plus to unlock the stealth camo do you have to play on a certain level of hardness if you are going the no alert way and if you go the ez way can you use the ez gun i really want the camo that makes you invisible and is it true that you loose alot of stamina when using it and does it mater how many times you save the game and can you really shoot all of the frogs because it seams really hard is there a way that i can get the camo an easier way if there is please help i really want the stealth camo
were in Chyornyj Prud is the Ga-Ko camo located