BLUE TONGUE SKINKS

I'm only about two years into keeping Northerns, and was wondering what those of you (in the northeast regions of the United States) are experiencing with yours this time of year. My male (confirmed) is extremely restless and my one female (assumed) is in total brumation and my other one (older, and also assumed female) is sort of semi-brumating. I do not change their conditions or force brumation. My older female brumated for three months last year. My eastern is dropping sperm plugs all over the place but unfortunately no female.
Anyone have input?

Two of my males are up and down the last two weeks. The other 3 (1 male and two females) are totally down. All are almost 2 years old. I think with the cold finally setting in up here they should stay down till I warm them up.