I work First Aid at one of the smaller music festivals in western New York (Great Blue Heron Music Festival). We get about 7,000 attendees, and another ~700 volunteers. It’s all outdoors, although there are tents and pavilions where you can get out of the sun. Bands that play there include a lot of people you’ve never heard of, some you’ve heard of, and many project bands that include people you’ve heard of but might not realize it until you get there.
I love it. This particular festival is very family friendly, with areas for Kids and Teens activities (two different areas) and lots of families attend year after year. I’m very proud of the “Lost Child” procedures I’ve helped to create, which have resulted in no child/parent being lost for more than 9 minutes in the last 3 years. Hopefully as an attendee, you won’t even have a clue about stuff like that going on behind the scenes, as it were.
One admission for the whole long weekend, all bands included. Day passes are also available, but I highly suggest bringing a small tent and sleeping bag anyhow, as most people who come for a day decide to stay longer. Music is all day and all night, and includes lessons and jams for professionals and amateurs, as well as the official performances. If you come, do check out Jim Donovan’s drumming workshop - he’s made of awesome, and his workshops always end up with people who didn’t know which end of the drum was up making some really nice rhythms together.
Lots of vendors selling everything from clothing to jewelry to camping supplies to instruments and more. They do something called “blanket vending”, too - one afternoon anyone who wants to can spread a blanket and sell stuff, without paying any vending fees. This is great for folks who don’t want to or can’t afford to have a booth all weekend, or just have a few items for sale. Lots of handmade jewelry and artwork among the blanket vendors. Food vendors, too, including some healthy vegan options, and last year we had the best BBQ I’ve ever had - I hope those guys come back! And make sure you try Vick’s curly fries - he cuts 'em fresh on site from actual potatoes, and smothers them in a cardiologist’s nightmare of cheese and bacon and yummy stuff. So good!
Are there drugs there? Sure. Mostly alcohol, some weed, and generally one flavor of the year like mushroom chocolates. First Aid/Security doesn’t care all that much about what we don’t know about - we don’t generally go searching it out or anything. I feel fairly confident stating that it’s that way at most music festivals. You may be searched on the road by local law enforcement, however - on the way in or on the way out. If it’s brought to our attention on site, we have to deal with it…but let’s face it, if it becomes the problem of First Aid, then you’ve got a serious problem, either with the drugs or asshole friends who aren’t taking care of you. I have had to deal with a couple of overindulgers, but mostly of alcohol. My philosophy is that if you’re breathing and have friends who can keep you safe, go sleep it off in your tent. If not, I have some cots in First Aid where you can sleep it off. If you start being a pain in my ass, I’ll call EMS and let them take you to a hospital instead. But mostly I deal with band-aids and sunscreen and handing out condoms to embarrassed teenagers.
I’d say just go for it and see how you like it. I prefer the smaller music festivals to the big Summerfests and Lallapaloozas, but YMMV.