Well, I used to park in the commuter lot and ride my bike over my car when I went to the city. It's not usually bad in the city so long as you follow the local rules, (For example here you cannot ride on the sidewalk, have to handsignal, etc). Please do be careful though, Even with mirrors and lights on my bike I have had a few close calls.
The most dangerous thing is cars parked on the road opening their doors, in my state bicycles have the same right to the road cars do, so I wont get over to the right in the path of car doors, even if it does frustrate them behind me. It is all part of riding defensively. Also, I find that if I load stuff onto the rear rack of my bike, it is more stable than carrying it in a backpack or over the handlebars.
I hope it works out well for you, be careful out there, sometimes cars don't respect or know the rules with bikes.
