I recently capitulated and bought Outdoor Retreat, so that my sims could use the camping equipment on their adventures in the jungle. This makes Jungle Adventures the most expensive GP I have bought s...
The campfire is deadly - the first time I used it, my Sim (who had full cooking skills) briefly caught fire. Her gf was off fishing, and I hadn't saved since the previous night (Sim time, that is - I save when I put my Sims to bed). Fortunately, she was just scorched, but I've heard many stories of campfire mishaps.
IIRC, the chairs slot themselves in around the campfire, so you can't scoot them away and still interact with the fire.