I've got some snake oil to sell you, bro...
No snakes up here to oil, bro, but thanks anyway. I could use some moose-oil tho.
My opinions on this are based on personal experimentation. I don't take any one's word for nothin' , tho I will check it out if it seems interesting/advantageous... It's cost me some money here and there to do so, like on Gore-tex (mostly hype) and the electronic ear muffs for field work, and the moose juice.... (electronic muff are good on the range, but useless while hunting - unless, perhaps, hearing impaired, which I am not - Do NOT believe my wife - even tho she's repeatedly tested me with her audiology gear...she always goes away, just mumbling " I just don't understand it.....".
) So far, the moose juice has proved a bust, but I have some left to work with....
I too think Scott hit it- taking "special precautions" makes one more cognizant (if you have half a brain) of the real stuff- going clean, moving slow, keeping quiet, and working the wind- assuming the wind is steady in one direction. Easier said than done in my moose hunting conditions- on the Plains where I grew up, it was darned near an unconcious ploy - we never really thought about it- we just did it. Same with "predictable" mountain slope winds. Not so easy on flatland, wooded Alaskan venues, where terraine, wind, and differential heating between lakes, bogs bare ridges, and low, wooded ridges all mixed up complicate things a mite... When you are trying to fool a moose into showing itself and the wind puffs into your face from 5 or 6 directions in a single minute, "plan B (every scent advantage you can employ)" might increase the odds just a bit in your favor. You will, based on a couple decades experience, probably still lose....at least before they are good and horny... Most everything else depends on just being there in the field and luck. The occaisional "dumb moose" helps also. The more remote you can get, the "dumber" the moose get. Same with all critters.
On the other hand, you might just have a hunter-concious moose standing 15 feet downwind of where you are seated on the ground, freshly showered with no-scent soap, and wearing freshly laundered, de-scented, aired clothing - the moose with a puzzled look on his or her face (both, unfortunately, not legal animals) going " I smell something, but, what is it??". The young bull spent about 20 minutes browsing within 30 feet of my feet, at one point, within 17 measured feet. Downwind.
Not a lone incident.
I know more about moose under-bellies than I care to impart.....
Face it. In a nice, steady one-direction wind, it doesn't matter how bad you stink if you are downwind. If you are out of sight behind a ridge or brushline, or not moving, with or without outline breakup, it doesn't matter what you are wearing. If you have cover noise (like a falling rain), noisy Helly Hanson fisherman's raingear works just fine (BTDT).
In other conditions, YMMV.
Rancho Loco- if things were as simple as you imply, those Coues deer hunters wouldn't have to use $1500 Swarovski spotting scopes and take 400-600 yard shots. Conditions vary. I doubt they need worry all that much about either wind or UV visibility at those ranges. Well, maybe wind - I've seen moose scent me at that range.
One size does not fit all.