If you have a thin "wallet" designed for one or two credit cards and a few bills, that would be ideal and non bulky. The M.O. is to ask for your passport when using your credit card although one time I used my Calif driver's license--which fits perfectly into the thin wallet. Otherwise I front pocket everything valuable. And to be safe, distribute your cash, some on you, some in your purse/bag, some in your luggage pack in the hotel room, and some in some other piece of luggage. That way you hedge your bets.