Operating NX5U in cold temps

Hello. I have an outdoor videoshoot coming up where the temperature is expected to be in the mid to low 30's (farenheit). The manual says the safe operating range is 32 to 104.

With that said, I should be safe, but close to it's recommended limits.

My main question is this: the actual video shoot is only 5 minutes, 2 times during the night, with about 1 hour in between. Would I be better off to leave the cameras outside the entire time, or bring them indoors inbetween shoots?

PS FYI: just spoke with Sony tech support and asked same questions. He recommended trying to keep the camera as warm as possible. He did feel that it would be better to bring it indoors inbetween shoots, and, he recommended while using it outdoors in the cold to keep a blanket over it in order to help keep the heat in. Makes sense.

Thank you!
Eric