As a fellow RV-9 builder, I would love to have your expertise when you return to Dallas! If you get back in July, I might (hopefully!) have my -9 wings here in Arlington.
It is about a 35-45 minute drive from where you are staying to my home/RV factory (that is, anytime other than rush hour

).
Please let us know when you plan to return! I'd love to have you stop by for a home-cooked meal and some building / BS-ing! If you ever manage a stay into the weekend, I could come pick you up and take you around to the local airports. We have TONS of RV's within a short drive of where you are staying.
By the way, the Double Tree: Galleria is a nice place!
Travel safe, and let us know when you will be returning.