Never heard of PCS orders for Reserve IP's who attend the Active Duty course, which all Reserve IP's are required to do.
From what I recall, you'll be on orders for the 22 odd weeks you are there and will get per diem, etc., etc.
Sorry for my ignorance, as I'm still transitioning to SELRES and will have to take this course - do you get BAH while on orders, and if so, what determines your BAH rate, where you live or where your drill unit is based?