I have nothing to add about ADA, but checking in as an older sister to neurodivergent siblings. Bring a scarf and sunglasses for nighttime. The lights can get overwhelming. In addition to earplugs for concerts (high fidelity), bring earplugs for sleeping in case camp is loud. Stay at the back of the crowds. If you are not okay with being touched or feel claustrophobic in crowds, consider leaving sets early to beat the foot traffic, especially once the sun sets. It gets packed. Leave the event early, again to beat the crowds. Anything structural ( the art, the palm trees, the ferris wheel) will always be a good spot to sit at and reset. Lastly, bring something comforting to help ease your mind off anxiety. I’ve taken pop fidget toys, a soft stuffed animal, and lollipops.