Thanks VidaNaPraia for your responses. To answer your question, I expect we will have plenty of time between matches to drive all over Bahia, not just the city of Salvador. And I've driven in over 100 cities around the world and there is a first time for everything. So I'm not too worried about that. I did most of that in the days before GPS, but if I can use a GPS that's much easier. As for Avis, I have President's Club status so they take very good care of me.
I won't need to call any other cities in Brazil. Just Salvador and incoming calls mostly. But I would very much prefer to have 3G data to get emails and use Skype Chat and voice if possible.