The best way to break out of a spawncamp is this bridge in my opinion:
http://desmond.imageshack.us/Himg542...pg&res=landing
Apparently, many players don't know how to get there, maybe because you have to climb up these boxes (marked red on the picture) which may not look like you can climb on them on first sight.
http://desmond.imageshack.us/Himg841...pg&res=landing
From the bridge, you can easily clear the area below from spawncampers due to the height advantage or just avoid them and move on to the control points. Hope this helps a bit..
Maybe the devs should put a stairset there to make it more obvious and realistic, I don't think the oilrig workers have to climb boxes to get to work in real life... ;D
PS: Somehow, i'm not allowed to post attachment, i tried .jpg and .png with valid file sizes and under attachment, it says "You have uploaded the maximum of 5 files" but i never uploaded any. Can someone help me with this?