I've hunted deer in D15 for the last few years. In my experience, this zone requires a lot of work ...or some good luck. Got me a decent forkie a couple years ago partly due to luck. Buddy and I scouted all summer and found a couple shooters that pretty much stayed in the same area. This specific area is very easily accessed, so of course come opening day, there were about 7 other hunters in that square mile lol. But, because I got familiar with the area and had a good idea where the deer were going to be, I walked out in the dark to set up.
Hilariously, a couple of the hunters saw me walking out and started following me! I came over a small ridge and waited for them. They came over after a few minutes and I confronted them(in a friendly manner). I asked what their plan was so we could minimize each other's interference. Their response was: "well, we were just following you." I face-palmed a bit and directed them to an area where I wasn't planning on going. I ended up setting up just as I planned and shot one of the two bucks we had scouted. Buddy was out of town so he missed out. Watched the other buck get chased around the rest of the morning while I dressed mine.
Point is, you either do a lot of work and find a good spot that is not easily accessed (and there are several in the zone), or you go to a more popular area, but plan on playing the crowd.