i think that camping is much more intense the doing loops. everyone can do loops. its easy and safe. yes you might have a walker be in front of you every now and then, but you can either kill them or manuever around the easily.
camping is much more fun for me. come the mid 30s the only wall weapon worth anything is the svu. and if your not on with your headshots, things get dicey. thats where the intensity brings the fun.