Jeff, I use one of the available holsters. I strap that to a limb or the platform of my stand. They light with the push of a button. Turn it on, let the gas run for a couple of secs and then hit the ignitor button. Yes they do have a smell. I can smell mine so I'm sure the deer can too. It is not very strong and I have never noticed it having an effect on deer. How many went around me that I never knew were there? Who knows. I do know that I've had deer 5 yds away while I had it on. I think, and this is JMO, that deer in my woods don't yet equate the smell to danger. How long that remains true is anyone's guess. My offer still stands if you want to test drive one and don't like it I'll take it and pay you for it.
EDIT: When I strap it to the stand I make sure it is well under the seat to keep it out of the way.