No, you can get a drink in Dallas.
I don't know if they've simplified things or not, but areas in the county used to be wet or dry based upon where precinct lines ran about 100 years ago.
But you can still get drinks in 'dry' areas at 'private clubs'. If you have an out of state driver's license, the manager might sponsor you as his guest. If you might be a cop, you have to pay the $1 or $5 initiation fee and be accepted for membership (process takes less than a minute most places) and you get a membership in the club - which may cover a number of separately owned bars in the geographic area.
A lot of the clubs are computerized, so you don't even have to carry a card.
To make life simple, only one person at the table has to be a member, the others can get drinks as a guest of the member.
So no, it is not difficult to buy a drink in the county once best known for the Carousel Club and its owner.
Thanks for the clarification. I remember visiting a friend who lives near the stadium and having to drive across the county line to buy a case of beer at a store.
Maybe the store alcohol sales laws are different.