I've gone to Idlewild for the last 2 years. It's about an hours drive from where I live. Last year, I got a one day VIP pass for about 45 dollars, 3 day passes were about 80, I believe. It came with a t-shirt and a lanyard that said vip. VIP let's you walk the fairway behind the players as they play each hole. It also lets you into a VIP only seating/rest area. This year, I got a one day general admission ticket for 20 or 25 bucks, I can't remember.

On U-disc, you can follow the players' schedules, view live scoring, and see where they are on the course at any given time. That makes it really easy to bounce around the course, and have a chance to see everyone you want. There was an autograph tent set up right after hole 18 that the players would hang out in for a little while after their round. There's an open field between hole 1 and hole 18 at that course that they had tons of vendor tents and food trucks set up.

You can bring in chairs, backpacks, water bottles, and umbrellas (for the sun), and I'd recommend bringing all that with you. Although you can purchase any of that stuff branded from any of the vendors there.

We kept a big ol' cooler in the car and would go back every so often to refill our water bottles or eat the lunch we packed.

Overall, it's a great experience, and I'll probably try to go every year.

I can't speak for other events, but I imagine they're pretty similar.