My main question is is the HCl salt active?
Yes.
Would I just have to re-calculate the dosage to make up for the weight of the HCl ion?
Yes, if your source for suggested dosage really referred to the freebase. In the Tihkal entry at http://www.erowid.org/library/books_online/tihkal/tihkal05.shtml (http://www.erowid.org/library/books_online/tihkal/tihkal05.shtml)
the suggested dosage is for the hydrochloride salt.