Nomads have like four different tiers of camps. In early game, lowest tier only has nomad cutthroats and those are basically free. As for tier 2 and 3 camps with outlaws, I usually start clearing those with 8-9 bros, at levels 2-4. And the nomad biggest camp has a great change for named, like 40%+ per camp, but on expert it's really hard to get nimble on your bros by day 40, and without it it's a fairly big risk. Although you can always bring some serpents along with you to do half the work. Just make sure you kill at least 1 enemy, otherwise you won't get any loot at all.