I ALWAYS take a "wad" of stamped $5's with me whenever I travel. Especially when travelling by vehicle across the country! I purchase my fuel using them as an example. This way they get distributed in some out-of-the-way town in Saskatchewan (or elsewhere). They're not used to seeing those stamped bills as much as the larger cities. And, I suggest, unless its a MAJOR purchase where its advisable to use your CC to get the awarded "points", I suggest you pay cash for ALL purchases. You'd be surprised how easy it really is. Many retailers love it as they are usually short on $5's as most folks these days use $20's.