Yellowstone

[Bullitt]

Yes you can (and should) make reservations. They fill up quickly. Go through the Xanterra website http://www.yellowstonenationalparklo...mping-250.html

I camped there for 4 nights summer of 2008. It is absolutely gorgeous, and 4 nights was not even close to enough time.
Photos here: http://pruett.smugmug.com/Travel/Yel...58740252_BgVnp
Bring your own food. There are restaurants and very small convenience stores with a limited selection of fresh food.

The park is massive, highlights include the long staircase down to the base of the Grand Canyon falls (not for those who have a fear of heights. Not kidding at all, it is a simple metal staircase bolted to a sheer rock wall that goes down hundreds of feet), West Thumb geyser basin, Mammoth Hot Springs, Grand Prismatic, the Yellowstone Lodge, Roosevelt Lodge, and of course Old Faithful.
Summer in Wyoming can be odd. Bring light clothes for the daytime when it can be nice and sunny and hot, and a thick fleece and pants for nighttime when it can get cold. I'm talking 40-50F degree temp drop from high to low over a day. You will be at elevation too, so don't push yourself too hard hiking around if you live at sea level.
There are pay showers and pay laundry, bring quarters.

Want to know anything else just ask. I lived in Wyoming for a year back then, beautiful country out there. I hope you're driving!