Prophetstown is a new Indiana state park. As a park it has a lot of potential but still has some growing to do. Its best attribute is very few people have found it yet. You can walk or ride bikes around with very little traffic. I have never felt crowded like you do at some of the other state parks.
The campground is excellent for what you pay. It is around five years old and it shows. All facilities clean and are new very well maintained.
Being a state park they don't have a pool or big playground, but if you enjoy camping out under the stars in a quiet and peaceful campground this is the place to go in north central Indiana.
Word of note, the front half of the campground (southern portion) has a lot of privacy on most of the lots, many with complete wrap around evergreens and other trees. However the northern portion is mostly wide open with few if any trees. It really depends on what you enjoy. We've stayed in both sections and enjoyed them both.
The northern section sits up on a small bluff with wide open prairie land all around. It is great for people watching and wonderful sunrises/sunsets. The southern section is great for privacy and the feeling of almost living in the woods.
One word of caution, the park trials through the prairie grass has chiggers so plan accordingly. We have not had a chigger problem in the campground itself, but some of the trails are through 3-4 foot talk prairie grasses just the kind of conditions for chiggers.
Final caution, follow the park's directions for getting to the campground. The "official" address is on state road 225. A map will show you that SR 225 cuts right through the center of the park, but there is no way to enter the park from SR 225.