Not from DFW but am from Texas. Here's what I recall about parking from seeing the Rolling Stones in 2015:
Bought a parking pass with tickets (StubHub), Lot 15 (see map link above). I think it was "only" $20 or $25.
I think I got to the lot about an hour before the gates opened. I exited a few exits before the ones marked "Stadium" (I was coming from Fort Worth), and took city streets to the lot. Drove right up, had my choice of spots, no issues.
Wasn't too far of a walk from Lot 15 to the stadium, and all of the crosswalks are manned by police. LOTS of police. But very helpful.
After the show, took our time exiting the stadium and returning to the lot. Took about 15 minutes to exit and go about a block, but once we were past that first block there were NO problems with traffic. Again, took city streets and got back on the freeway "away" from the stadium.
Hope this helps.