RE: Propane Heater
I don't know... I have wondered about this myself, but I look at it this way, as we all know, there are plenty of times deer and even big bucks come up into people's yards, many people use propane to heat their houses, so IMO, it doesn't make much difference.
As I stated in a different thread, my future father in law has a heater in his blind, and he has deer around him all of the time, now granted, he has never had a monster buck by his blind (that he knows of, I'm sure they have been there!)... but, he has does all over the place and smaller bucks around, so who knows, I would think that it isn't a scent they associate with danger.