Even without the weekend in Cali, if you can get away from DFW to OK, they have embraced their Rt 66 Heritage.
The Rock Cafe in Stroud OK. The owner was the inspiration for Sally Carrera in Cars.
If you are willing to go a bit farther up, there is The Blue Whale of Catoosa
Stroud has The Shoe Tree.
Davenport OK has really cool old murals on the side of the buildings downtown.
Arcadia has the Round Barn, and just a few miles down the road is Pops, which was built to be a Rt 66 Icon.
That dumps you right at my residence in Edmond OK. Not a landmark, really more of an eyesore according to my HOA.
Lucille's Gas Station in Hydro, the old one (the new one, Lucille's Roadhouse is in Weatherford).
The Tom Stafford Museum in Stafford (he was an astronaut).
Windmill Farms
Two museums; Clinton has the Oklahoma Route 66 Museum and the National Route 66 Museum in Elk City
There are a lot of Rt 66 attractions in OK.
This place is a great source
and you don't have to go all the way to Cali.
I have made the drive from home to Las Vegas and a few years ago, my wife and I drove to San Diego. New Mexico has a lot of the RT 66 next to the highway, but the road itself is pretty much gone.
But if you are headed that way, swing by London Bridge, if for nothing else, the photo op