So guys, I know you get anxious about it, and believe me, I get that, I've been there.
I will say that last year, on Friday particularly, locals even told me it was the worst they've ever had in terms of parking; Friday was us, and the One Direction concert, and something else, I forget what, downtown.
Anyhow, parking should not be as bad this year; as far as I know there's nothing going on at Lucas Oil except us of course. :)
That said, please please don't consider it the end of the world if you don't get a hotel room downtown tomorrow. Keep checking back here on the forums, and the site, where people will drop rooms.
And if you are at a non downtown hotel, please know that I don't think the parking will be as crazy this year as it was last year. :)