It may not be fun for gaming but, for survivability, camping is the best form of strategy. Find your choke point, keep your blindspots covered, pick them off as they peek their heads in. Again, it might not be fun for many players, but I like to play as if I am my character. I play as though it's my life on the line for a greater sense of immersion (there is no re spawn in real life). Which means I'll take 1-0 over 3-1 if I can. Because being dead sucks.