Wolf spiders are the HUGE ones that seem to stalk me. Massive scary things. My cats can hear them from one room to the next and try to heighten before I ( well, husband as I am so scared) gets them outside to safety.
Katherine, strangely although our cats are indoor cats, and have free reign, the never come into the bedroom until they hear us begin to wake up. Then the girly starts howling for us to get up.
You can get very secure window screens ( may be expensive) in order to have full doors or Windows open but secure for your cat. The cheaper ones we have on our very high windows which they can't reach so are safe.