Here's the deal, Daryl is getting conflicting information, that is ONLY going to lead to confusing him
First off, he isn't wandering around the woods "stinking stuff up" or burning things out". He doesn't even indicate he has sat in the stand yet. He said he HUNG the stand.
The ONLLY way he is going to be able to tell anything about the scrapes it too WATCH them. Either in person, or with a camera. And, he will HAVE to get in the area to do that. Period. Now, ideally if he could sit 100 yards away and keep an eye on the scrape line to get an idea, that would be advantageous. Depnds on the terrain though. And no, 100 yards isn't too close. You are withing 50-100 yards of deer all the time, and don't even know it if you hunt where they live.
This is obviously an agricultural area. That being the case, there are people, machines, and maybe livestock around all the time. So, the deer are accustomed to human traffic to one degree or another.
You can sit a stand EVERYDAY if you want to. ANd I said before, during the rut, if these are active scrapes, that show promise, you should. You can approach the stand from different directions nearly every time. Your scent trail is going to stay until it disspates, and that's dependent on the weather, so, not much you can do there.