Piedmont NC to Seattle, WA
I'm planning to move from Piedmont, NC to Seattle, WA at the end of May / beginning of June. Considering a cross country road trip to make the big move. I'd like to make the trip in a week or less; allowing time for scenic stops. I'll be traveling with my cat so stops would be fairly short. Not sure how well he'd handle big stops and leaving him in the car is not an option. I'd love to see some amazing National Parks and State Parks along with way. Yellowstone, yes, please! I'm just starting my planning so any suggestions / tips are more than welcome!
Options and Out-of-Bounds
I would agree with one of the major points that Donna made. And that is that Yellowstone is just too large, too far off your main route, and will be too traffic choked to be worth seeing on this trip. Much as I would agree with you that it would be the highlight of any trip, in this particular case trying to include it would drain pretty much all of your available spare time and resources, leaving you with being able to do nothing on your other days but drive, drive, drive.
However, I would disagree with her a bit on another point, the time needed to get to Seattle. I make it just about five days at 550 miles a day, leaving you with two 'spare' days worth of time for sight-seeing. Still not enough time for visiting Yellowstone, but enough to make the trip very relaxing for both you and your cat. Now, to be honest, the difference between 5 days at 550 miles/day and six days at 500 miles/day is not up to us, it's up to you and what you are comfortable with. Obviously, fewer miles a day allow for more frequent and or longer stops. There are many such free, scenic and interesting stops all along the major Interstates (even those not listed - check your maps).
Besides deciding how many miles a day you'll be comfortable with, you have another decision to make - your route between Piedmont and Sioux Falls. There are at least two viable alternatives. One would have you heading south on I-81 first to Knoxville and I-40 west to Nashville. Then there's a series of Interstates (I-24/I-57/I-64) through Paducah KY and Mt. Vernon IL to St. Louis, I-70 west to Kansas City, and I-29 up to Sioux Falls. The other possibility would be to use US-25E up to Corbin KY and I-75 north to Lexington, I-64 west to Louisville, and I-65 north to Indianapolis. From there I-74 will take you to the Quad Cities and I-80 west to Iowa City where you would use I-380/US-218/US-18 up to Mason City IA and a short stint on I-35 north to Austin MN and I-90 west to Sioux Falls. Those routes are close enough in distance and drive-time that you should make the choice based on which one takes you to the most places or through the type of scenery that you'd like to see.
Besides all the smaller stops already talked about, there are a few larger venues that will help make up for missing Yellowstone, On the southern route for the eastern leg of your journey, that might be Land Between The Lakes National Recreation Area. On the northern route for that same leg you should look at Cumberland Gap National Historical Park. While Badlands National Park would be on the western leg of both.
AZBuck