I currently moonlight one week every other month and use official leave to do so (built up to over 60 days from 5 years of residency). This supplements my military income well raising my income from effectively around $160,000-$170,000 (including the military tax advantage) to around $280,000 per year (I'm a subspecialist moonlighting in a rural location so pay is very lucrative). This also takes into consideration not paying any state income tax (I'm a Washington state resident) which would effectively cost me $20,000 per year if I was to stay and practice as a civilian in the state where I'm currently stationed. When you are able to work like this, military medicine is not such a bad financial deal.
In addition, I generally do not work more than 45 hours per week at my military job unless I have to come in on-call, which is rare. I am still able to see around 25 patients per day and have my AHLTA notes done by 1630 and out the door.
My point is do not let everyone on this website tell you how bad military medicine is. If you play your cards right, you won't be so disgruntled.