"I'm real overwhelmed," she said as baby Zahiriah, wrapped in a pink blanket with embroidered elephants, slept in a car seat. "We're at it again. Last year we had to do it. This year we have to do it. And you have to be around all sorts of people â¿¿ strangers. It's a bit much."Before leaving their home in Atlantic City, John and Robshima Williams of packed their kids' Halloween costumes so they could go bunk-to-bunk trick-or-treating at a shelter. Her 8-year-old twins are going as the Grim Reaper and a zombie, while her 6-year-old plans to dress as a witch. "We're just trying to make a bad situation good," the mother said. "We're going to make it fun no matter where we are." ___ Breed reported from Raleigh, N.C.; Contributing to this report were AP Science Writer Seth Borenstein in Washington; Katie Zezima in Atlantic City, N.J.; Wayne Parry in Point Pleasant Beach, N.J.; and Dave Dishneau in Wilmington, Del.