I am currently using Cortman Medical as my base, can't say that I feel safe there always hordes of zombies right outside the door, but I have tons of food and water so I'll survive a bit longer. I want to migrate to the house up north, ( http://pzmap.crash-override.net/#0.554039420427313,0.4245194475864252,83.50957106447592 ) but I do think I need to go 3-5 times to get all of my stuff up there, and that might be though, but it looks like a great place to build a base, and hopefully safe and with less zombies.