Great Choice.!! You can go anywhere from there. Custer State Park, Needles Highway,Deadwood, scenic Spearfish Canyon, etc.
If you stay close to the Lodge you will have lots of SxS company. Still plenty of room for all.
You can also get out into the boonies and be by yourself.
Several good eating spots within 5-17 miles. Custer Crossing, Nemo Mercantile, Deadwood Miners , etc.
They are doing some road construction on US 385 by Pactola Lake. You will have to trailer on 7 miles or so of gravel. Not bad, just a delay.
Hope this helps !
Maybe you can get @-Bear- to share some of his secret trails ??