Howling - wolves and hybrids howl, whether out of loneliness, at sirens, or for their own wolf reasons. Take into consideration what type of neighborhood you live in and what your neighbors will put up with. Mouthing - mouthing and nipping are natural behaviors which must be modified at an early age. Teaching an adult 120 lb. As far as being good with kids, yes, they can be brought up and socialized with children.
Many hybrids grow to be very large in size, and play roughly as well.
Regardless of breed or content, no large dog should EVER be left alone with a child. Obedience - wolves are extremely intelligent. They do, however, have their own reasons for doing things, and do not have the inbred desire to please humans that dogs do. But many low contents have, with perseverance, gone through formal obedience training class and even excelled. Another extremely important thing is that you establish yourself as alpha early on.