HFWR
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
If you are planning to add Dallas to your visit, I'd suggest a stop in Ft Worth. There are many nice attractions and restaurants in Dallas, but Ft Worth also has a lot to offer. Great museums, including one focusing on Western Art, and a nice "smaller city" feel.
"Most cities have soul, but Dallas must have been at the bank when they passed it around." Austin Lounge Lizards
A few suggestions:
Motorcycle Riding in the Texas Hill Country
https://www.texasstaterr.com/
Czech Stop
Lockhart, TX | The Daytripper
Road Trip: The Borderlands of Texas -- National Geographic
Palo Duro Canyon State Park
Just for size comparison, the DFW Metroplex (Dallas-Fort Worth) is about the size of Connecticut.