We thank you and your husband for his service.
We recommend immersing
on time on the chance he is able to get home sooner than expected.
Some communities do follow the kabbalistic custom you described. If it is a known custom in your community, it would be appropriate. Otherwise, many halachic decisors, including both our site’s founding rabbinic supervisor, Rav Yehuda Henkin ztz”l, and our current rabbinic supervisor, Rav Kenneth Auman, deem such practices unnecessary.
Please feel free to get back to us with any further questions.
Bsurot tovot!