Ok was thinking about taking out a disability insurance policy, but then I read the fine print (AMA's disability policy), basically, my interpretation confirmed my others is that even if you insure yourself lets say for 5K/month in replacement income (assuming you get something from the military), you don't necessarily get this... Apparently to avoid disability fraud the US governement limts the amout of disability income you can earn to something less that our income.. The problem is that your military disability counts against that amount, so you potentially could be paying for a big policy but then find that the company cannot pay out.
Now I may be totally wrong here, but I would ask really hard questions and really focus on the fine print.
I've opted for a really aggressive living will,

i.e. kill me I get disabled as the family does better with my life insurance over having a gomed out dad.