Looking for a babysitter/ homebased daycare just for few hours for 1 day in San anton

Hi ladies
I am bascially from austin tx but i have to go for the citizenship ceremony in san antonio i need some help finding a babysitter/daycare for just keeping my kids aged 6yr and 3.5 yr old for few hours till my ceremony etc is done.For all those curious souls , i don't have anyone close in Austin , both husband and me have to go together, I am a stay at home mom so have never really kept my kids in daycare .
I can keep them in Austin but since i would keep them in a hourly daycare here i literally have to rush drive from SA to austin ,so i would prefer someone in SA that way i don't have to rush drive and secondly its like a Fun outing with them too .
I am looking for a reasonably priced option since its just for a day and one time thing.If anyone can provide some info would appreciate it