I had good Verizon signal here (70 down, 20 up) but zero T-mobile signal.
The campground is close to down, there are two museums within walking distance (just steps from the campground entrance). Across the street is a walking & biking trail that will take you straight to downtown, where you'll find a coffee shop, a few restaurants, and other shopping. It's less than a 5 minute bike ride to get there, and very scenic as it follows the river.
The facilities are newer and pretty nice. The showers are the single-button kind with no temperature adjustment. If you wait a while, the water does get barely warm enough for a comfortable shower.
This is not a quiet campground, it has a well traveled highway on one side, and a city main street on the other side that semi trucks use during the day. Sometimes there are highschool football games at the stadium next to the campground. Late at night it does get quiet.
The sites are grass or gravel. There are electrical hookups at most sites, with water faucets spread throughout the campground. The sites are mostly shaded.
I enjoyed the George Maier Rural Heritage Center and Museum ($5 admission) and the Elkader Depot Museum (free) which are located right next to the campground.
The downside to this campground is the dump station. It is just a hole in a manhole cover. It's in a dirt/weedy area and smells terrible. It's located across the street from the campground.