- Talk with the bartender about the guard
- See the event on the track with Scar and Tank
- See the event in the bandit's camp with Tank chasing someone
- Do an event with Logan (In the camp if you encouraged him to do something with bandit, in town if you discouraged him)
With those four things done there should be a new topic available when you are talking with Jester about you wanting to meet with Scar. Then you can infiltrate the camp during the day.