I feel you. I went to Ozzfest 3 years in a row around this time and I also saw this band live at Snocore 2001. I was at this Ozzfest, I saw Reveille and Shuvel on the side stage but sadly I missed Slaves On Dope! Shuvel f*cking killed it.
I always felt like this band was destined for something bigger than playing at Ozzfest and being one of Ozzy's investments. They were genuinely really damn good.
My first Ozzfest was 1999. It was soooo amazing seeing Deftones, Slayer, Rob Zombie, and Black Sabbath. I was at this Ozzfest too and 2001, 2001 was by far the worse due to all the bands like Linkin Park, and Papa Roach...Nu metal started to go soft around 2001 with Linkin Park. Manson's set at Ozzfest 2001 was very special though, back when Marilyn Manson was still a professional musician and hadn't really lost himself to drugs and alcohol yet.