Need advice for a Wild West One-Shot (inspired by RDR2)

Hey guys,

I recently picked up a Brazilian Wild West RPG system called Sacramento (heavy Red Dead Redemption 2 vibes) and I’m putting together a one-shot for my friends. I have a rough outline, but I could really use some feedback on pacing and story beats.

Here’s the idea:
The session starts in media res right in the middle of a bank heist. The vault blows open, the players grab the cash, and the law immediately surrounds the place. A chaotic shootout breaks out, and during the escape, a Native American NPC (or I might actually ask one of my players to play as this Native American character) helps the gang shake off the posse and slip away.

Once they reach a safehouse to catch their breath, this character calls in a favor for helping them escape. The favor is to help their tribe, which is being hunted down and driven off their land by the law/corrupt tycoons.

I really want this session to lean more into heavy roleplay and investigation rather than just endless combat, but I have a couple of worries:

1. Is this too much to cram into a 4-hour session? One-shots need to be tight, and I don't want to run out of time.

2. Does this idea sound cool? How can I make the transition from "hardcore bank robbers" to "helping a tribe" feel organic, and what kind of cool investigation/RP challenges can I throw at them in the second half?

Any tips or ideas would be awesome. Thanks!