You know, I really don't think Hokoda got back more often than his men. I think it's more likely that everyone who wasn't pregnant or had a kid left, which probably got rid of all the people who where at Katara's age when the show opened, which left the babies and their parents behind. Plus, since the village was so small, it's unlikely that ANYONE has a really big age cohort - I bet the babies are all 'MUST SEX BEFORE I DON'T SEE YOU FOR YEARS' babies.