Hi Tricia,
We are also arriving on Sat - probably about 12.30pm in Vera.
I've been checking where is open etc on line - looks like the supermarkets are open 'til 10pm - the Mercadona on the main road from Vera to Garrucha is my first port of call.
Sorry I cannot give you more info. but would also be keen to hear where's open etc.
See you soon!!
Shirley