We've tent camped twice at Springbrook, and though it's not perfect, it's a nice campground we plan to keep coming back to for a number of reasons.
-Not a far drive from Des Moines, but still quite remote
-Lots of nice hiking trails
-Easy access to large, mostly clean modern bathrooms
-The lake is a peaceful spot to spend the early mornings, a nice place to fish (but don't expect to catch anything) and its beach is fun on the hot summer days, and tends to not be too busy. Has lots of benches around to sit and enjoy the view.
-No cell reception, which could be a "con" but we like that it forces us to unplug
-Tent camping spots are clustered mainly in the middle of a loop, which feels a bit like a fishbowl with no privacy
-It's mainly an RV/camper campground, which can be loud/rowdy at night for tent campers. Lots of parties happening the two weekends we were there. Definitely don't recommend if you want a peaceful weekend away from the world.
-Other than hiking and a bit of swimming/fishing, there's not much to do
-Firewood is a short drive from the campground, which can get inconvenient