Brixton,
In answer to your questions:
1) Yes, I am quite sure than Hexamine can be mailed. However, I wouldn't quote me on that. E-mailing
2) Don't bother with hexi down there, it's not even worth the hassle.
3) My Dad went climbing in Peru three times in early 1970's. I specifically remember him telling me that you'll be able to get white gas (naptha) down there for stoves. I just asked him where to get it, he says at any drugstore. (Go figure!)
4) I said white gas, because the truth is, if you're going down there, I wouldn't risk hexi tabs and a billy, let alone a fire. Plus, you never really know what kind of weather you'll run into. Most of us here all love Trangia stoves, but since you won't be able to get meths down there, I'd honestly white gas is your second best choice, due to it's high BTU output. You won't find LPG down there, either.
Which leads me to fuel tablets:
There are two types:
Hexamine: UK Army,
esbit, Coghlan's, etc etc..... it's actually compressed methanamine, smells like rotten fish, is very difficult to light and makes the bottoms of your pots and pants all sticky and sooty. BUT: Once you get it lit (and wipe the sweat off your forehead) you'll find that it burns for a good amount of time (some tablets 12-15 minutes) and you CAN cook on it. I've made rice and sausages on my Esbit stove. Hexamine (methanamine) tablets can be blown out and re-used later. They leave a horribly gooey ash on the bottom of the Esbit stove. I'd suggest scraping it off. They're also bloody expensive and stink up your kit.
Trioxane: US Army "heat tabs." These are made of compressed formeldahyde. (the stuff that preserves body parts in laboratories) They're much larger than Hexamine, because their calorific value is a bit lower. Heat tabs come in sealed packages, because they evaporate over time. Sometimes you can buy a box from a surplus store, and find a few empty, punctured packages. Each bar is scored in 3 places, and they're much more poisonous that methanamine, if you breathe in the fumes, you'll get a nosebleed, and you'd better wash your hands after touching them, or you'll get a wicked headache. On the plus side, and I actually prefer them over methanamine tablets: They light in a flash, you can actually get them lit with a fire steel (so I've heard) and they burn much hotter and cleaner than methamamine; so they don't leave any residue on the bottoms of your pots and pants. They also leave little or no ash. Unfortunately, they only burn 7-9 minutes, which is not enough to cook a meal. They're basically only good for heating a canteen cup of coffee, or lighting a fire. But fot all those drawbacks, I prefer them. Also, they're so cheap it's not even funny.
Footwear: Well, that depends. If you're going mountaineering, go buy a pair of stiff climbing boots. If you're humping around in the jungle, go buy a pair of US army boots (they'll last forever) some good insoles, cushioned wollen socks, and some footpowder. Each night, change your socks, and powder your feet. The reason I suggested you get jungle boots if you're not in the mountains is that they actually DO prevent jungle rot. Have a look at
this.
Whew, is that a long enough post for ya mate?
Cheers,
Adam