creatine (actually creatinine, the metabolite of creatine) is for flushing. it won't hide any THC metablites. if your intentions are to be clean of THC (and everything you're doing is excellent for that) then don't rely on a flush; which some labs count as positive on an immunoassay and will confirm with a gc-ms; which analyze for THC on a molecular level and flushing doesn't affect them.
and as far as the hemp oil alibi, a US Marine won a court martial case a few years back by claiming that. since then some, if not most, companies have taken the psychoactive chemicals out, thus you wouldn't have the cannabinoids in your urine. but the Chinese Medicine "curve" sounds good. haven't heard much about that either way. hope that helps