If you plan on going, especially if you plan on riding to South Dakota, you want to make sure that you begin to make preparations now rather than later. Take your bike out for a long run ASAP to make sure that all the parts are working well and if you need to replace anything quickly there is still time to order from Demon's Cycle and get a great deal.
You can read more about how to get ready for the Sturgis Motorcycle Rally at the Demon's Cycle Blog
