Urban campground is near a busy highway
This campground has many sites to choose from - RV with hookups as well as some non-electric tent sites. There are quite a few activities in Marshalltown, and it is within the Marshalltown city limits.
The downside is proximity. It is right next to the highway. When I was there in a tent, the hog trucks would drive by all night (loud and smelly). The RV sites are closest to the road, so maybe it is not so bad in an RV, but it is not particularly enjoyable in a tent.
Pros:
+ Marshalltown has quite a few places to eat
+ Nice bike trails (and a great bicycle store downtown)
+ It is near the Iowa River
+ Nice park in general with activities like a dog park
+ Camp host on-site
+ Decent sized campsites
+ Playground for the kids
Cons:
+ It can get busy on a summer weekend
+ Noisy - right by the highway
+ Mosquitos are really bad here