John,
there are several designs in different eras where Byron was said to collaborate - He worked with Ralph Plummer in the 50-60's (including Preston Trail and Great Southwest. There is a good video of him desribing PT and giving most credit to Plummer and I spoke with him about GSW - he said the mounds in front of 2 green were his idea and the planting of many Crepe Myrtles to replicate ANGC was also his idea)
Later, he worked with Joe Finger and was also the nameplate on the descendant organization of Finger/Dye/Spann. That is how is name is attached to Timarron. Its a good course and 99% Ken Dye (or Baxter Spann)
Later yet, he joined forces with DA Wiebring, and they have some courses in Japan with his name attached, and a few in DFW, like Bridlewood in Flower Mound. I doubt he was really active in the design of those, either.
If Jason wanted to go the local legend route, Trophy Club - Hogan's only design (although Joe Lee was the mastermind and he took his name off it in a disagreement of some sort which has been discussed here) would be a course where the pro seemingly really collaborated. At least Hogan wrote some stuff about what he liked and didn't about the course.
As home to Club Corp, I suspect that there are many courses run by them that have fairly liberal reciprocal play arrangements in DFW.
BTW, I would offer to join Jason over Easter, at GSW or one of my designs, but I will probably be out of town visiting family.