Here's the situation... In 1000 BCE 5000 people from 13 cultures each are transported to a whole other world, for a total of 65000 people. These culture group together and divide up so that we have a few situations...
The Ionian, Samarian, and Egyptians settle about 2 days away from each other so that they are in three 5000 person group that regularly interact.
There are also Celts, Teutons, and Slavs that are around them... so something like 15000 people that are nomadic and interact with the above 3 groups.
The Zhou, Jomon, and Viet settle in another area and blend together for a 15000 person group.
The Vedic group settles in it's own area for a 5000 person group.
The Olmec, Maya, and Algonquin Native American nomadic 15000 people group that interacts with the 2 groups above.
My question is how do these groups divide up their settlements? Should they be creating 1 settlement or would they create several equal settlements or 1 large one with several satellites, multiple rather large settlements then a few satellites or what? Also would those satellite villages follow a river or would they try to keep as close to the main city... ie is distance from city or river more important for the satellites?