funnily enough, we did almost exactly the same thing. Got to Pontiac well before CI, hung out for a while and watched as that cell came up from the SW, went west of town and chased it through town. Didn't see the ground circulation on the touchdown, but wow that was some incredible motion on the wall cloud. Thought for sure it'd drop something big. Followed it east to Emington, and then the people I was chasing with wanted to head west, waiting for the Peoria cells to pop off. After getting back to Pontiac, we saw that cell really ramp back up on radar and absolutely booked it east, intercepting near Wichert IL, except by that point it was completely rain-wrapped, and we couldn't get ahead of it, so just followed it a few miles to the south until we finally got a couple miles east, where we saw the Wheatfield and Knox tornadoes. So no, missed the big Kankakee tor and mega-hail. Also missed the Lake Village tor (although we almost drove into it)