For a ONE day visit... it sounds like you're going to be pretty busy. Traffic won't be as horrible as you might think on a Sunday near the GG bridge. Just don't go too far north or you'll hit hte dreaded 2 lane section of the freeway which IS super slow...

As far as what I'd do... it sounds like you have alot of it covered. Once you're down at the wharf, you may want to walk back down a road called "Embarcadero" It's the road that boarders the north end of the peninsula and is connected to the road the Wharf is on. It has some beautiful sights. If you're tired of walking, there are cable cars (not the traditional ones like on TV, but modernized ones) that run Embarcadero. At what I would say is the end of anything important is the "Port of San Francisco" a big building used for farry's and things like farmers markets. There is a public transportation that supplies the bay area called BART. You can ride it back to within a few blocks of your hotel for about $2.00 a person. It's underground electric rail. Nice and speedy . Last but not least, and if you take the trolly you'll see it, is a place called Union Square. Union Square is the third largest shopping district in the US. It's a pretty decent size with just a real city atmosphere. It's a few blocks away from a BART stop as well. You can find it on a map easy, or just ask anyone from the area. I'm sure they'd be glad to help you. If you have any questions, post again, and I'd be glad to answer them =-).

Sincerely,
Jeffrey Osborn