Amazing. With all that space, snipers still pick the same few hidey holes over and over. Memorize these two locations and they'll be powerless.
Sniper Nest #1: Even behind the beach-side base, snipers get a great view of the entire valley. Now you know why you can never make it to the enemy's HQ without getting a bullet in your head.
Sniper Nest #2: Here's the other reason you never make it.