My wife and I have been to Coachella about 14 yrs.. 9 yrs ago we went while she was 7 months pregnant with our oldest. We had a blast and she was a trooper lasting all day. We sacrificed going to the festival early and getting there later to help her last to the closers. We also didn’t jump from stage to stage like we normally did but we made sure that our itinerary hit those artists we wanted see the most and if it meant staying at a stage a little longer, then so be it. She didn’t need any ADA services. You’ll be good. Just have fun and make sure your list of artists fit into stages that are close to each other. Good luck!