Have you considered the Air Force Reserves? I am currently active duty Air Force Major and I work in the SICU. I was selected for a civilian CRNA program, which starts Jan 2014. I will transition from active duty to the reserves so I can continue my studies full-time while still enjoying the benefits of being in the military. One thing I will say is the Air Force really does take good care of their people. I talked with Chief Nurses at several reserves units and they all have said I will be supported for my anesthesia studies and will not be deployed. Some nurses in one of reserve unit have not deployed in over 10 years. Also, deployments are optional in the Air Force Reserves. If you don't want to go, there are always other people who will volunteer to go for you. If for some reason you are in a specialty, which is critically short, such as ICU, OR, ER, and Flight Nursing, if you just happen to pop up for a deployment, you can deny the deployment and transition to the Inactive Ready Reserve (IRR) since the Reserves didn't train you in your specialty and you're coming in with experience, you have a lot more say versus being on active duty where they invest a lot into your training. The Chief Nurse also said if you want to guarantee not to deploy, she said I could take a slot as a med-surg nurse. The good thing is the AF Reserves are paying a $15,000 bonus/yr for a 3 yr contract for ICU, OR, ER, and flight nurses. So the extra money will come in handy for CRNA school. Active duty pays about $20,000/yr for a 4 year contract, which I am on my last year of receiving that bonus.
You have lots of options but I think the Air Force is better. There is a guy who is a Army reservist who will be starting in the same CRNA class with me and he is currently activated to my hospital now. His tour will be finished in June and then he is going to switch from traditional reserves to the Inactive Ready Reserve so he can focus on school.
Good luck to you.