I've just realized my packing list has precious little with pockets, and a great lot that will make anything around my neck obvious (light, thin cotton skirts and linen pants and fitted camisoles, light shawls to cover up, one denim jacket with useless pockets!). I'm concerned a moneybelt will also be obvious under my clothes, which are fairly close fitted and will reveal the outline of anything as bulky as my passport.
I do plan on carrying a bag. It's a pretty large messenger bag, and I currently use it much the same was I plan to use it when I'm at home. I feel secure taking it with me to inner city Oakland and San Francisco because I can zip up all the compartments, and cover all but two very small pockets with the flap that can be secured. I can also secure the bag to my person with built in straps and wear it in the back (easier to walk) or front (easier to monitor). I'm wondering if keeping something like the PacSafe TourSafe wallet clipped to the inside of the main compartment would be safe enough to store my passport? Or is that too great a risk? I can certainly try the moneybelt, but what do I do if it's obvious under my light clothes?