Batteries 'are' hard to find
back pack would be first preference, as rolling luggage will take a beating on the cobblestones, and the inclines might be tough. Walking shoes no doubt, although many Italians wear high heels (?). Sandles might be slippery on the inclines, especially with smooth soles and poor ankle support. no problem Batteries are difficult to locate, however we were there mid afternoon when many shops close. I saw no camera shops, however closed shutters obscure the window displays and shop names. no idea.