as Thunder said and others agreed, if it is legal, then it is not legally cheating. Many ppl like to get into the ethical argument about these things, but who cares. Most of us are not still living in the Stone Age, and with the progression of time has come new technologies. Why not use them. And if someone thinks our Neanderthal brethren didn't hide behind a rock to ambush their pray, or ambush them over a nice grassy patch as they came to eat, they are sadly mistaken. Back in that day, cover scent was probably as simple as rolling in the mud.
I am opposed to none of the options you have listed if they are legal. I also added that option to your poll.