I joined National Guard in 2011, our unit had 6+ dentists and a couple of specialists....Loan Repayment pain in the ass to get, Bonus (25K yearly) was okay.
We sat around during drill weekends with nothing to do, and doing powerpoint training (SHARP). Time would really drag! In 8 years we didn't see a single patient. It will take you 2+ years to become "credentialed". It was the biggest waste of time of my life, in terms of doing something productive and helping others. I would feel like a hack every time I would write my OER , because all we would do is sit on our asses....all year long.
My opinion...the suck factor is not worth the money you get out of it, and Im not even factoring time away from family.