I have never have had to have a reason to get out in the woods I just go when ever I want. Always have and always will. As far as trail cameras I have two but I don't depend on them that much. Most of the animals that I hunt can be patterened as to where they wander to. The trouble with a trail cam is that where the animals are when you take the picture they are not there when the season comes about. Either other hunters or the weather will push them around. Now if I was some place in the southern areas of the states then you would not have to worry about the animals since they say in the same general area, or at least should.
I have 2 but only use one at a time. I should use both but i dont. I primarily use them to see whats moving at night. around here a lot of the bucks go nactural in july and stay that way till bout december. but if you get them on cam at night you know there in the area and get out during the season and possibly jump him in his bed during the day.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...