If I am traveling alone with the kids, I would stay onsite. I think it would be nice to not have to deal with driving, carseats, hauling luggage, and coming back to a dark house late at night. But then again, I am someone who would almost always choose to stay onsite anyway. The intangible feeling of being part of the Disney magic 24 hours a day is valuable to me. I have friends who would much rather stay at luxury off property hotels when they go to Disney, but that doesn't interest me at all. If I can afford it I will stay on property every time.