OK I get a gobbler every year except I missed my shot last year, this is what I would do........
You say you found droppings ok good start where where these droppings? If they where under trees look up are the branches mostly strait? do you see any wing feathers? if both are true you may have found a roost tree most likely there will be more than one roost tree in the same area look around.
Are the droppings you found at the field edge under a tree? tree = roost Not under a tree? do you see drag marks? tracks in a figure 8? If so = strut zone.
The other place you found droppings where there scratch marks digging up the ground? if so that may be one of their feeding areas, also some roost areas will also be torn up as they feed.
When I know an area has gobblers I go to a high point at dark use a locater call and mark the roost area they called from in my mind then in the morning I hike in when I think I am close I use the locater call so I don't get to close.
When I have a gobbler that hangs up I make him gobble so I know where he is then I run closer to him maybe 30-50 ft then I start calling excitedly, for me they always come in I realize this wont always work but so far so good. ( you have to have good cover to do this)
If you are going to set up at the edge of the field where you saw lots of sign (pos. strut zone) I would set up close to it maybe at the center point of the sign and 6 ft. into the woods with a clear sight shooting area of at least 10 ft., if this is a long stretch try to find where they come into the strut zone and set up there. Set your jake decoy just past you and facing you in the strut zone with a hen in the mating position maby two ft. from the jake.
You must be concealed very well and you are going to shoot before they get this close. If a jake about to mate in their strut zone don't get em fired up and coming in I don't know what will.
You can hunt past noon in NV cant you? If so I have more tips for you.
Good luck!