State laws and regulations vary widely from state to state, and may be more restrictive than federal regulations. States often have restrictions on the amount of alcohol that can be brought in that applies only to the residence of that State. Generally, people transiting through a state are not subject to those restrictions, but sometimes regulations change. You can check with the Alcohol Beverage Control Board of that state to find out what their policies are.
There is no federal limit on the amount of alcohol a traveler may import into the U.S. for personal use, however, large quantities might raise the suspicion that the importation is for commercial purposes, and a U. S. Customs and Border Protection (CBP) officer could require that you comply with the requirements under the Federal Alcohol Administration Act (FAA Act), including the requirements to obtain an Importer's Basic Permit and a Certificate of Label Approval (COLA) with the Alcohol and Tobacco Tax and Trade Bureau.
In Texas for instance:
The maximum quantity of alcoholic beverages you may import into Texas is:
1 gallon of distilled spirits.
3 gallons of wine.
24 12-ounce containers of beer (288 ounces of beer).