I am a little confused about how much time you are allotting for the drive and Yellowstone together. From Las Vegas, Yellowstone is about a 1-1/2 to 2 day drive, depending on which route you take. Then, you should probably allot at least 2 days in YNP, another 1/2-full day for Grand Tetons, and another 2 days for the back to LV.

Something else to keep in mind: Yellowstone is open year round, but many of its roads and most services are not. Most of the roads are open between Memorial Day (end of May) and Labor Day (early September). Many on the west side will be open in mid-April, but some in the higher elevations will not be, because they are full of snow.

When we were at YNP and GTNP this past summer, we put well over 400 miles on the vehicle, just driving around sightseeing. This is done at 30mph (or less). We did the NE quadrant (and Beartooth Highway) one day, the southern "loop" of the 8 the next day, and the northern "loop" of the 8 plus Gardiner on the third day. We drove out and spent the 4th day at GTNP. We still felt like we missed some things, but we figure for us, it will just mean that we WILL return someday.


Donna