Take as many films as you can or as large memory card as you can - Richmond offers a lot for photography lovers :-).
For pictures at night and/or bad light (weather) and esp. pictures inside Jefferson Hotel (on my picture) take a tripod.
Luggage and bags:
Unless you are going to a debutante cotillion or something like that, pack light.
Clothing/Shoes/Weather Gear: There are four distinct seasons in Richmond, VA, just like most parts of the U.S.A. Dress for the season. In the summer, it can get extremely hot. In the winter it can get extremely cold. In every season, it can rain, so always pack an umbrella- that is, if you can get it through security.
Photo Equipment: A simple 35mm camera will do.
Camping/Beach/Outdoor Gear: For the rugged outdoorsy types, bring plenty of sun block and mosquito repellent. The mosquitoes are brutal in the summer.