Based on the surmise that it is legal in your state to feed and supplement minerals otherwise you would not be asking. We can legally hunt here over whatever, so in my experience: 2-3 sites on 50 acres not too many with the understanding that mineral sites are better utilized early on in the year and will not do you much good to hunt over them. Minerals are a good thing to put out for overall supplementation year round. As to finding trails...set up and observe late evenings on pastures and clear cuts see where the deer are moving to and from, then place feed sites or cameras or whatever. Another trick to locating trails is to cruise dirt roads/atv trails and look for crossings. A trick to check trail use is to pull a few fresh pine limbs with needles on as a drag behind you...come back in 24 hours and you can tell by the tracks how well the crossing is used. As for drawing deer into an area...yes feed and minerals will do that but you have to place the station where the deer are at least going by, ie trails. If you are going through a dry spell check out water sources for signs of activity. BTW what state are you in?
It matters not the weapon nor its caliber, rather the caliber of the one who wields it.