Yeah, I think it was Fdd who said it perfectly a couple of years ago - "if the choppers were that good, they'd find it all." Best way to beat the helicopters is to spread 'em out and mix 'em in with other plants. 3 or 4 plants 20 feet apart in a field full of other plants is almost impossible to spot except by pure luck, but if you bunch 30 or 40 of them together you can practically spot them from the international space station.
Welcome to the forums, bro. If i were you, I'd spend the next couple of days just scrolling back and reading every thread in the forum until you can't see straight anymore. Then start asking questions. Until you have at least some idea what people are talking about, you won't know what questions to ask, and nothing we'd say would mean anything to you anyway. It's not that we don't want to help; it's just that we need some sort of a starting point.