Sometimes, yes, you have to be quiet.
Decided to satisfy my curiosity one day and looked up places to hide from zombies during an attack.
Yes, people actually wrote about this.... Even the Huffington Post mentioned it, referring to the five best parks to hide out in during a zombie apocalypse. Okay. (Actually some pretty places I wouldn't mind going to otherwise.)
Makes sense - pick areas less populated, more isolated, less likely to have lots of zombies. (But then if it's a popular camping/nature area, all you need is one person to get infected to ruin it, right?)
Cracked.com also had this part funny-part serious Guide to Zombie Survival.
The best advice? Use your head if you want to keep it. haaaaa!