No, even on lower difficulties it is a severe pain in the arse. Even if you manage to last a while they send troops out to get you while you hide. It's horrid.
Basically you have to deal with the line of sight really well. There's a tree or two you can keep between you and the gunner as you approach. Then there's a big outcrop of rocks which you wait behind (I think).
Around there somehwere you'll be able to see there's a gap under the big fallen tree to your left with a crate. DON'T try and crawl under there. You will get stuck and swiss cheesed almost every time. From memory around there somewhere there's another gap and you can cut straight back up the hill and be on the other side of the fence, free to continue to the village. I can't remember exactly how this works off the top of my head. But even knowing the right way you'll still probably die a couple of times in the attempt and won't avoid getting shot entirely.
Edit; yep, I just checked it. You go towards the big fallen tree and run back up the hill. It's hard to see that that's where the fence stops until you run over there.