I have spent thirty years traveling around the world, and have had very few issues with airline security or limits dictated by the laws of any specific country. I have always packed a knife in my checked bags, the size depended on the country. You must know the rules of where you are going. Lighters, too many matches or other types of fuels are the one hard limitation now. I have not tried wet tinder cubes, but I have never had any problem with a flint and steel, cotton balls and a tube of Vaseline lip balm. In my carry on I always carry at least the equivalents of what you find in the PSK and have never been questioned about them. For cordage, I use dental floss. I usually even carry a wire saw, never a problem. I have at times carried the tiny folding saw, but this is becoming more of an issue. A heat sheet survival blanket never raises a question. Prepared foods are not an issue. Empty water bottles are no problem, and you can fill them once you get through security. I always get a pocket phrase book for whatever language is appropriate, and endeavor to learn at least ten most useful words. Dressing appropriately is also critical, and never an issue. Learning a bit about the flora and fauna which might prove useful is a good idea. One of the first places you can visit once at your destination is a drug store or hardware store for the items you could not carry, but in some parts of the world, the stores are not classified so easily, so you may have to look around a bit. Prioritize your survival equipment: Shelter, water, signaling, fire, food. You all know the rule of threes: 3 hours without shelter, 3 days without water, 3 weeks without food. Think about what will put you in the survival situation, what are the likely circumstances. A properly dressed person with a waterproof/ windproof layer, some method of shelter, water and signaling should survive most situations a traveler would encounter. Your brain is your best tool though. Prepare it properly and you will survive.