Thanks for the recommendation. Unfortunately when I called the KOA campground in Deadwood, they are all booked during the rally dates.
I'm planning to drive from San Francisco (via Canada) to the rally and the drive will take almost 12 days round trip. Due to my job, I can only stay in Sturgis for 3 days. Do you think it will be possible/advisable to just drive into the Deadwood, without reservations, and find a camp site?
Are reservations a must during the rally?