One thing I will mention about taking kids, is that their hands and feet GET COLD.
Warm clothing (warmer than you think they'd need), with good gloves and boots... Hands and feet get cold.
I used thick socks with snow boots for the kids (thankfully snow boots are cheap), and mittens in the morning.
I used to take out a couple old thick duck hunting jackets... They would lay on one, and pull the other one over them, and sleep until the birds started gobbling... I looked for a cheap camo sleeping bag, but could never find one.