Personally I feel that if I love my cats they are kept in side. There are too many dangers outside, raccoons, skunks, bears, large dogs, and CARS.
We have three feral in the house. And yes they would love to go outside, as would the rest of the CREW. We do have howling and crying some times. They do stop after a time. I would rather have noise then go crazy if one of my babies was hurt or missing.