I think all the bots should be placed so that they add to the atmosphere of the maps, rather than detract from them. In my opinion placement associated closely with stalls, caravans, tents etc, preferably in small groups, achieves this. However, placement in the middle of nowhere, or in isolated rows, or by transit points from one map to another, do not. There are plenty of unoccupied stalls around the maps, the bots would make them look more in keeping.