We will be doing a 3 week drive this summer from Toronto to Banff and Vancouver, and then heading home through the US. This will take us through South Dakota. I'd like to spend approx. 2 days in either Custer State Park or Badlands National Park, to take in some of the scenery, wildlife and do some camping and hiking. Since we have such a limited time, I'd like to get some opinions as to which place may give us the biggest bang for our minutes.