My son's SEAL unit filled out their absentee ballots in March.
They should be mailed out the latter part of September after all primaries are over and ballot is printed. I have told him to mail his signed, sealed form to me and I will personally carry it to the polls.
That is the trick. You should put that out somewhere. Tell all active duty military to mail their ballots to family and let said family hand carry them to the voting boxes. They have drop boxes for absentee. Hadn't really thought of that, but that should get put out somewhere.