The map is... not good. It clearly shows the ambush point --with another, crossed out, marking suggesting the original point on the main road-- but assumed those reading it knew where they were coming from. Meht if you had not taken over navigation from the captain, you are pretty sure you would never have found what you are looking for.
As it is, it is nearing sunset by the time you all realise you are getting near. The big hint is the unusual fog that permeates the area. This time of year, this time of day, there should not be fog, especially not localised to this one valley like this is. More than just the damp cold makes everyone shudder and pull their cloaks close around themselves.
• How are you approaching? What precautions have you taken?
Cook, you have never seen the 'temple' --most of the bandits haven't-- but you have all heard rumors... unbelievable rumors, mostly... about it and those of your who go there.
• What have you heard? What do you think is going on?
The bandit camp is mostly empty since they went off on a job. None of them have returned.
• Who else is still in camp, and why?
• What about Cook causes the party to give him a chance to join you instead of sniping him in the heart (the old "bandit queen's gambit").
Anyone should answer.