Don't leave your room at night to go to the parking lot for something you forgot. Even with security cameras, you aren't really safe.
I guess that depends on the area the hotel is located and who you are. I'm a 6'4 man so I'm probably a lot less vulnerable to being jumped than a 5'2 woman. That said if somewhere felt like the kind of area I'd need to stay indoors after dark I probably wouldn't want to stay there anyway.
I've always been curious at why people think CCTV keeps them safe. All it means is that someone in a warm office, who may not be geographically anywhere near the actual camera, can see you getting beaten up. Assuming they are even looking at the appropriate screen at the time.
The reason I brought it up is because we stayed at a hotel on the ground floor (we had a dog who couldn't do steps) and there were 2 cars with their motors running and their headlights shining in our room for 2 hours! My husband went outside at one point thinking it would make them nervous, but they remained and just gave HIM a dirty look. He finally told the front desk and they said they were guests and weren't out there long. Was it a drug deal? Was it something else going on? It was winter so they probably needed the heat on in the car which is why it was running. But wow, that was the worst night we ever spent at a hotel and I'm very glad they didn't have a weapon.