anyone not getting the Scar / Tank boss fight? Doesn't matter how often I go to the camp or sneak in nothing happens?
Do the following things to get to them when you have it ready to unlock:
1. talk with the bartender about the cocky guard (He is in the Tavern, which you can enter between 21:00 to 5:50, if you have trouble trying to get a list of topics you can have him talk about, select rumors after using the talk option)
2. see Scar's event on the tracks (This might happen randomly)
3. Talk to Jester (If you sneak in the camp at night, you might run into him which should unlock the talk option for him)
4. You should be able to sneak into camp during the day (This is when you can start the boss fight against those 2)
Also, you need to sort out the situation where Logan either stay in town or head to the bandit camp.
The option to sneak in the camp is only after you talk with Jester about talking with Scar. If you made everything (Track event with guard, camp event with tank, an event with Logan - if encouraged to go to the camp then in the camp, if discouraged then in town), there should be a new conversation topic with Jester that will unlock "Base infiltration" option.