Hi all. I've been playing a brand new world called Brooklyn Heights. It's really cool. Feels very artist-y. Anyway, I want my main Sim family to travel to a custom world I already played in SimM...
I never had to repopulate a world when I traveled to other worlds, when I come home all the sims are still there. If you want the travel world populated you could use one of nraas mods to rapid populate, once it populates, it should stay that way even when you go home, unless you start a new save and in that case all travel worlds reset.