What should I be careful of/aware of, etc
Most Helpful Girl
Well, it's not going to get cold at all, not at 75/80 degrees. And it seems that you really, really want to wear leggings, don't you? But I'm not sure that they are appropriate for a bonfire because they may be too warm. Step outside of your comfy zone & wear shorts or a skirt, or even a sundress with a little sweater if you think you'll be cool.
If you feel you just really need to wear the leggings, wear them with a short skirt and cute tank.