First, I am so sorry for the OP... I know how horrible this is! Really what they say is true. A once of prevention is worth a pound of cure. If you are staying 4 nights, I don't think it would hurt what so ever to get mattress covers for your mattresses now. To be kept on a least a few weeks. Pack all of your outfits in ziplock bags, make sure to pack one extra. So on our laundry day when washing everything you still have one clean. It also can't hurt to add some borax into your laundry, with everything washed and dried on hot. All outfits go back into the ziplock bag, so in the event you have some riders.. they aren't coming through your laundry. It may see like a super paranoid thing to do, but once they get in, you never ever forget.