I'm always saying this. I no longer live in the area but of course I meet lots of people who really want to visit for Halloween. I tell them just go in September or November. The spooky/haunted/witch stuff is there all year round- it's Salem, that's the point. If you visit at any time when the weather is cool and the leaves are any color but green, you'll never know the difference. You could probably even wear a costume and nobody would think twice about it.