I just moved to the state and have never been. Thanks!
Go at least once, but buy the tickets after you are fairly sure the weather will be nice. You have to pay an arm and a leg no matter what, a few hundred extra for last second seats is nothing to make sure the year you go is not like this year.
24 yrs old here, still wouldn't go to the infield. That's a 20 and under drunk experienceIt is a huge crowd, and expensive, so not to everyone's taste. Be prepared for a LONG day. That being said, yes, it is worth it to go every ten years or so, it is a tremendous spectacle, lots of tradition, and there is nothing like it.
As for the infield, if you are more than 25 years old - DON'T.
Depends how much you win/lose for this guyDerby is awesome. Hell yeah it's worth it.