Before you pack them in to your bag, pack all of the belongings in clear nylon bags (preferably zip lock), divided by clothing type, e.g. shorts, t-shirts, underwear etc.. Each kind of clothing in a separate bag. Doing this is extremely handy in several ways: for instance, when unpacking your bag just remove from your bag a series of nylon bags to immediately see the clothing item you are looking for. That way any overnight stay only means removing a single piece out of the plastic bag, instead of rummaging. This makes unpacking and repacking for customs inspections quite a bit of more pleasant.