Just finished one of the Moonshiners' story missions involving Maggie's nephew, Lem. Oh my God, that mission pissed me off to no end. The revenue agents have Springfield rifles and revolvers that can insta kill you without warning. Be careful running around for cover, you could run into a spawn area where a set of agents would spawn AROUND YOU.
Add insult to injury, the mission damn near softlocked on me. One remaining enemy had not spawned in to progress; I had to blow up the wagon for Lem to leave the wagon into a building to trigger the last spawn.
As an aside, there's free candies in RDO for a time being.