Not exactly sure which enemy you mean, but I definitely tried to stay as far away from the zombies as I could. So if there was one sniffing me out, he probably wouldn't have smelled me. :D
I was also very patient. as there is no timer or anything, so no hurry to get to the other side.
Or maybe I just got lucky and just happened to play it as was needed. I'd have to play again to see if I can do it a second time. :) Maybe in the next build I'll try it out and give you some feedback.