For me there are three approaches to playing Jungle Adventure:
1. Culture Tourist: This is my main way of using this pack, since I'm more of a family game player. I take sims on a relaxing tropical vacation. They usually rent one of the properties in Puerto Llamante and spend most of their time there, although they might pop over to Bellomisia to see the waterfall. They hang out with the locals at the cantina, doing open mic, maybe learning some legends and some dance moves. They go to the market to buy souvenirs and try authentic cuisine at the food stall. They might visit the museum and chat about the artifacts. I always bring more than one person and it really doesn't matter if they're playable or not. It's all about quality time.
2. Archeology Scholar: This is when I have a character who is focused on achieving the Archeology Scholar aspiration. Usually a nerd with a sense of adventure. Most of the time I bring other household members along but I have them doing things that are unrelated, either relaxing after a hard week's work or focusing on their own goals. Other people can't really help you with archeology. They typically stay in one of the properties in Bellomisia, because there are more potential dig sites there. Generally the archeology scholar focuses on excavation while in Selvadorada. They can take their time authenticating when they get home.
3. Jungle Explorer: This isn't necessarily someone who is working on achieving the Jungle Explorer aspiration. I did that once and I don't really think it's worthwhile. Often it's just someone who wants to shake up their routine with a bit of tomb raiding adventure. They might bring other people along to help if they're playable. It doesn't really matter where they live because they'll be going to the jungle, but they also need to visit the market for supplies. That's another thing: Stock.Up.On.Supplies.