Take the kids out, even if its raining and run them ragged, it makes them tired and they sleep
Look at my thread about deployments going one of 2 ways below and you will see that you are not alone. We have done R&R now and we are all looking forward to him being home in 4 ish months. Touch wood nothing drastic has gone wrong since the start of December with us so I am now having the better sort of deployment.
I feel for you, take a deep breath, have some adult friends round (even if it means having extra DCs around) and have some fun. Sod the housework during the holidays and make the most of DC going back to school by taking some time to yourself.