I've been to Yellowstone 3 times over the years, and there is always more to see. But for a first time driving about visit to Yellowstone allow at least 4 days, one day to tour each of the driving loops. Jackson is a fun town, restaurants, nightlife, shopping, hiking, Bar J Chuckwagon BarBQ (don't miss it), trail rides, so again at least 2 days, perhaps 4. Mount Rushmore and the Badlands is fun to tour. Mount Rushmore, not so much, up close and personal the carvings are dwarfed by the Nature around them. Custer State Park is fun and the entire area is one scenic drive after another.
Its all fun, you can't go wrong.
Happy Trails.
