Just got back from spending all of last week in Sturgis, SD and surrounding area riding the roads and twisties out there. Quite epic roads and for me the trip of a lifetime. Went with a friend from work and some of his friends. Seven of us total. Met up with 2 more guys while there for 2 of the days. Purposely went the week before the Sturgis Rally to beat the traffic and the price increases. Rode 1,000 miles of roads there in 5 days time. Had a blast doing some canyon carving and sight seeing too. Custer State Park and Mount Rushmore Roads were awesome. Went to Devils Tower one day and down through Spearfish Canyon. Deadwood was a neat place as well as Hill City and Custer. Needles Highway and Iron Mountain Road were epic. Traffic started getting heavy the last few days there.
Overall, it was a great trip and would do it again in the future sometime. I would highly recommend it but not during the rally week.