Motels with Corrals along I-90 (Rapid City, Mitchell: camping, arena, horses)

[sll3454]

I'm looking for places along I-90 where I can stay overnight with horses. Motels with corrals, fairgrounds that allow camping, campgrounds, private farms -

I have heard that Cabela's in Mitchell and in Rapid City have corrals, but those might not be good stopping points on this trip.

Know of any others?

[SD4020]

The arena in Wall might allow for overnight arrangements.