So once again, we need to be as specific as we can in defining the costs and benefits, and evaluating the trade-offs that came from these changes.
The more people in a particular region, the more items will begin to cost and the benefits more items. The more costs the more people will struggle to get items and do the trades.
Every once in a while they might come together with other bands, possibly in seasonal festivals at which they would share news and knowledge as well as giving young people the opportunity to find a mate outside their tiny community.
As they went out of their groups during seasonal festivals helps them learn new things and ways of doing things. This also helps them find their mates and learn from their mates and share them with their communities. I think this is very interesting as it helps them grow their communities and learn new ways.