Dartmouth's a great place and lot's to see too, if you're not staying long then the best thing to do is use the South Embankment pontoon, that's the one by the station restaurant and is the first pontoon you'll come to, it's not that busy at the moment.
Lot's of good places to eat including John Burton Race's place although most people look pretty miserable when you look through the window! Kendrick's is pretty good as is the new Thai restaurant just off Fairfax place, the best place for brekkie and coffee is Alf resco's on lower street.
There's the new Flavel centre that's opened, they have comedy nights, live acts etc, there's also a couple of good live music venues but it really depends what you're in to.
If you're coming down come and say hello, kettle's always on!