well I am on the fence about all this stuff
when it works it works and far too many times it doesn't
I have personally seen scents scare deer away amny many times
and yes I have sene it bring them in too
I honestly don't use scents anymore, I try to stay scent free as possible, and that includes adding any deer scents or attractants to my sets
as for rattleing
I have seen it work and MANy times I have seen deer pay ZERO attention to it
have had deer come in in sept to it and as late as fem here on the east coast
so it can work when a deer is in the mood

grunting same deal

I personally think age of the deer herd is a huge deal breaker in how well this stuff works
if you have a good age structure of deer, meaning a LOT of 3+ yr old deer, your odds of it working are much better , if you have a younger herd
not so well
I think it really takes a deer a few yrs to really get what it all means enought to respond well to it
so in all honestly
I carry a grunt call, and a bleat/estrus call, but really don't use it unless a buck is walking away
no scents

I have tried decoys too, and again if you have older deer they work better, but have seen 5+ yr old bucks in prime rut ignore a decoy covered with doe in heat scent

so to me too much work carring one about!

my 2 cents