I really don't bring anything extra at all. I only camp at night and I'm fairly well entertained by the forest. With others it's only the added conversation that entertains us.

I think food and drinks might also be included though. I tend to spend my time in camp on those and it's always a focus when I'm with others too. We pretty much keep preparing and consuming food until we go to bed. In a group we do get creative with food. We all bring something different and then share it, and that can be pretty entertaining.