A very well written article on incubating. It has everything you need to know to start or improve your incubation. Best bit of advice is don't buy a cheap incubator they can be unreliable at best and have inconsistent readings. This leafs to constant monitoring and poor hatches. Great article.
I think the best way to deter them is keeping food and water sources out of the open. Making the run as unappealing as possible will help to make them move on.
I like your idea of having rare breed poultry and the use of papercrete is ingenious! Could your run be more predator proof with welded mesh rasher than chicken wire?