This was my 2nd favorite spot that we visited other than the place we stayed at for the wedding. First reason it was so great was because of the seclusion due to it being on the south side of Lake Ft. Peck and away from any city. Be warned though you are pretty much on your own out here so be sure you have a full tank of gas before exploring. The 2nd and arguable more important reason I loved this spot so much was due to it being surrounded by the Hell Creek Geologic Formation which has some of the highest concentration of vertebrate fossils in the world! While it is illegal to take any vertebrate fossils you can get cool imprints of leaves and other invertebrate animals that lived right alongside the dinosaurs!
Duck Creek has nice camping spots, with no hook ups, but does have picnic tables and fire pits. Close access to nice boat ramp as well as easy access areas to the water for swimming, and fishing. Adequate vault toilets in area as well.
Paid camping in area as well, which offer hook ups and showers.