Brigs Woods is close to Webster City, IA. There are several campsites, cabins, golf course, access to canoeing or kayaking on the Boone River, along with hiking trails, swimming and fishing. This is one of the many county parks spread across Iowa. They have reasonable rates and many do not take reservations. One area is good for a group of campers as the sites are in a circle. A walking bridge links the back loop to the other loop that has the bathhouse making it a shorter walk.
There are sites with full hookups, H2O and Elec, or Elec only. Here is the website: https://www.mycountyparks.com/County/Hamilton/Park/Briggs-Woods-Park-and-Golf-Course.aspx
The wonderful thing about the park is the magnificent trees.