Clutch, how long are you stateside? If you'll be in the I-40 corridor area of Texas/Colorado at the end of September/start of October, you might be able to catch Rocky Mountain Race Week traffic.
We did Rocky Mountain Race Week on the OLD section of Route66 between Tulsa and Oklahoma City the last 2 years. You wont be able to take an RV on it due to weight zoned bridges, but you can stop near and walk or bike it from NEW Route66.
Just a warning: Many roads in Arkansas and Oklahoma are...lets just say that some are un-deserving of being called interstates or highways.
Be sure to stop and look at the big transformers in Stillwater Oklahoma, about 20 miles north of old 66 west of Tulsa.
BumbleBee is at 5104 W 6th Ave, Stillwater, Oklahoma
Optimus Prime is at 2201 E 6th Ave, Stillwater, Oklahoma
If you want to check out some of the Street Outlaws TV filming spotts,
302 Sertco Rd, Okemah, OK 74859
3306 Profits Avenue, Seminole, OK 74868
8600 S I-35 Service Rd, Oklahoma City, OK 73149
Business I-40 (Route 66) West of El Reno, just west of the prison
201 E0720 Rd, Guthrie, OK 73044 (About a mile south of this location)
You'll also be passing near Tulsa Raceway Park, 3101 N Garnett Rd, Tulsa, OK 74116