Obviously, you can't go to all TDY's with your spouse because kids have school, it may be too far for your family to drive too and the JAG has to fly, etc. But either way it is a way to make a little extra cash. J went TDY a few times when we were in Texas. If he chose to drive we would make money on gas and rarely could he ever use the full amount of money allotted for food each day.
Plus TDY's are a great time for the JAG's to meet other JAG throughout the military and discuss what's happening in their specific offices. At this particular conference there were JAG from Army and Air Force. I met a gal and her 3 children whose husband was an Army JAG that was doing the conference too. Our kids ended up playing together whenever we went to the pool and I got to chat with her.
Which reminded me why I am grateful J chose the Air Force. It is only for one reason and that is the deployment. Her husband has been in 9 years, part of that was as a Reservist but he has already been deployed twice and for roughly 1 year each time. It has been hard on her kids, more so when they were older than younger because they understand more. I never thought about that! I thought it would be easier if your kids were older. Which brought me to this conclusion about deployment: