Going down and up the Illinois River at that spot is relatively easy. There is a very slow current, with the wind balancing it out. You have to watch out for speedboats, as their wake can cause issues for a small kayak. I typically don't do this stretch over the summer, because there are a lot more speedboats between Memorial Day and Labor Day.
It's a very scenic area. You get to see two state parks and a ton of rock formations. There's a decent amount of wildlife. Plenty of seagulls, the occasional bald eagle, and flocks of pelicans. As long as it's not during the height of summer drunk speedboating season, it's a fun trip for most kayakers. Not the easiest paddle, but feasible if you have taken steps beyond being a beginner.