I found quite a few loves that didn’t have dump stations to my surprise. Use google and that’ll help a bunch. I used Cabela’s in Noblesville twice. 5 bucks but if your a Cabela’s club member, it’s free.
Biggest piece of advice is get there EARLY! I arrived at LPS around 11:30am on Thursday and most of the normal camping area was completely taken or roped off. I ended up camping by the pits in that area which ended up being nice. Lawrenceburg spots filled up fast as well. Most importantly have fun! It’s an experience and it gave me a better appreciation for what these guys and girls do on a nightly basis. The set up, tear down and then the drives to the tracks ended up being exhausting at the end of the week and hell I don’t have to worry about fixing a crashed race car lol.