Is it possible to conduct a split Annual Training (National Guard) with an active duty unit?

I have actually done this more than drilling with my unit. I get permission from my unit, permission from the active duty unit, and the AD NCOIC will send an email to my Readiness NCO stating what I did after I complete my SUTA. Some units may require a memo or a form, so double-tap with your RNCO.

Hey there, SGT,
If it is a COCOM, I would suggest reaching out to the Reserve Manager. They would know best. Also, they could grease the skids.

--The plus: you could be "free chicken" and learn a new facet of your tradecraft.
--The minus: if there are clearances to be passed, accounts to be set up, training, etc., 2 weeks may be futile for a AD unit.

Good luck!

Almost anything is possible if you have coordinated approval from the command you are assigned to and the command you wish to conduct alternate training with. You will need documentation from a commissioned officer with knowledge of your duty performance to receive pay, however. Your full time AGR/Techs can help with the administrivia.