There are many cabins and homes available for rent in the area.
Check http://www.vrbo.com/vacation-rentals/usa/south-dakota/black-hills/nemo for lodging.
Camping is available at the following sites:
Nemo Guest Ranch http://www.nemoguestranch.com/
Dalton Lake http://www.go-southdakota.com/Dalton-Lake/
Box Elder Forks http://www.hikercentral.com/campgrounds/117918.html
Trout Haven http://www.trouthavenresort.com/
Steel Wheel http://www.steelwheelcampground.com/
Fish n Fry http://www.fishnfry.com/default.aspx
Wild Bills Campground http://www.wildbillscamp.com/
Cousins Big Chair www.cousinsbigchair.com