I'm about to embark on a two-day business trip in Chicago. I desperately want to take my Rebel XS and assorted lenses, but this will be the first time I've taken it to a big city to shoot.I guess common sense applies, but has anyone had any problems with others being "interested" in your things?I might catch a White Sox game, which isn't in the greatest part of town, but would offer some great shots. Any advice appreciated.