Bring your bag(s) to your local FedEx Kinko's--they'll fix you up. Delivery to a hotel or residence no problem--that's our raison d' etre. FedEx Ground will be cheaper, IF you can forego the items for a few days (3-6?) ahead. Otherwise, FedEx Express wins the prize. But I am biased...

Be sure to hit Mi Tierra or Do Brazilia when you're in San Antonio.