How long has the situation laster so far. For example washing, I keep my old clothes, when work pants get too worn to look nice rather than throw them away they go in an old duffel bag in the top of my closet. When I need to paint or change the oil I grab one of those. So if I were in a bug in situation and ran out of clean clothes I have a set of older clothes I can wear.
Manual washing isn't too hard to figure out, toss clothes, water and soap in any kind of container you can find, take off the kids clothes and stick them in with them and let them play and splash around for a while.
hand tools you can use during notmal times so those should already be around the house.