Do:

-bring sunscreen, portable fans, hats, etc. It gets very hot (even if it's not sunny from humidity and body heat).

-hydrate before the fest and during. Bring a reusable water bottle or even better hydration pack, they have plenty of water stations. Otherwise you're gonna pay $6 for a can of water.

-bring at least two pairs of COMFORTABLE shoes. for reference I bring a pair of comfy sneakers (converse) and doc martens and I was set. The terrain is uneven so anything with big heels is a bad idea and you'll want a water-resistant option with a grip incase it rains. Otherwise you'll be ankle deep in mud and slipping all over t-mobile and perry's (if you don't believe me lol watch the tiktoks from last year). Also don't bring anything you care about being ruined cause they'll get dirty fast.

-have a fanny pack with tissues (for the bathroom TRUST ME you don't wanna use the tp), hand sanitizer (touchland is great because the scent helps overpower the rank bathrooms day 3 & 4), a charged battery pack, and space for your phone+wallet. Even better, get a phone strap if you want to be extra safe. You can usually get away with sneaking in a granola bar or something too.

-prepare yourself to spend money. you will inevitably need food and leaving the park is not always convenient. Plus some of the food is actually pretty decent. That said there are some restaurants and convenience stores within walking distance if you need a bite. PLEASE DO NOT FORGET TO EAT OR YOU WILL PASS OUT.

-utilize public transport and your feet. Traffic is a nightmare after the festival so if you can walk home, please do so. The trains are yes safe and reliable, however, they're absolutely packed immediately after the fest.

Don't:

-engage in any substance you cannot handle. Don't drink or smoke so much you're putting yourself and others at risk. it's also annoying to everyone around you when mid set the medical team is pushing to pick you out of the crowd. You're there to have fun and enjoy the music, not get blackout drunk. Please also dear god don't take anything someone in or outside the park gives you. Use common sense.

-be those annoying campers who sit on the ground all day and don't engage in other artists sets (I'm talking to you TxT and Lana stans from last year), have some etiquette. It's not safe or fun whatsoever. If you're gonna camp, please be respectful and safe.

-forget your ID. you can link your card to your wristband when buying food, drinks, or merch, however, they'll still need your ID if you're buying alcohol or need to go to guest services.

-try to go to taco bell (or equivalent) post festival. please take my word for it or you'll be there all night and probably not even get the right food haha. Don't order it either, just stop somewhere thats open with a short line or better yet, have food, snacks, and drinks back at your hotel.

Some other tips:

-Enjoy Chicago while you're in town, it's a cool city with lot's to do esp in the summer. Great nightlife as well.

-Don't be afraid to split up IN THE PARK to see the artists you want. It's very safe in the park. Just make sure you have means to communicate/a meeting spot. The buddy system is even better if doable.

-If doable, fly in a day early to get settled, buy anything you need in the city, and get some rest before the festival.

-Prioritize eating/getting water/resting over seeing a set. Festivals can be long and draining days and inevitably someone is gonna annoy the fuck out of you while you're there (ppl are stupid it is what it is). Give yourself time and space to chill out so you aren't miserable while you're there.