Don't worry about difficulty as far as having kids along. I've ridden all the trail systems except Ivy Branch and there's not a difficult trail on any of them, including the blacks. We prefer to stay somewhere around Gilbert because it's a central location that gives you easy access to 3 trail systems. I highly recommend taking the night tour out of Twin Hollows on Friday nights. It's also worth doing a 1 day Outlaw tour with one of the many guides just to get a bit of variety.