Ah this brings back fond memories of ROTC. Forced marches, EE, the obstical course and the mud course were more fun than one should be allowed to have for free. <img src="/images/graemlins/smile.gif" alt="" /> Okay, enough nastalgia. It's been about 15 years since I have done these sort of drills with professional, experienced instruction and back then it was 50+ year old retired USMC drill sergants providing the instruction so my technique may not be the best or most modern and my memory of the instruction and experience may also be lacking so I may be way off, but here goes nothing anyway.

1st: Forget shelter and forget fire! (and I really wouldn't worry about eating much either... just enough so you can concentrate on evasion rather than be distracted by hunger).
2nd off there is no such thing at useless gear!!! <img src="/images/graemlins/grin.gif" alt="" /> That's something you can teach the scoutmasters when you?re done.

Lets review your gear (hopefully I wont leave anything out).

1 set of clothes
enough food for 2 meals
a poncho
a PSK
a canteen of water

I don?t know what is in the "PSK" so I am at a major loss on this one and I will simply say that you hang on to this piece of equipment. Unfortunately there are probably lots of things in here that would be very useful but since I don't what's in there I wont speculate.

The poncho and the canteen of water will both be kept on your person as well. The poncho is all the shelter (if any) that you'll need for one night and the canteen of water should be obvious! You did say "jungle" in this implies warm climate.

That leaves us with 1 set of clothes and enough food for 2 meals. These may be the most useful items you have for purposes of evasion! Yup I'm serious. Since you're not being chased by bloodhounds (luckily) you will want to discard both the clothing and the food. However you will not just discard it anywhere... no sir. What you want to do is use it to lead your would-be captors on a false trail! Ah yes I see the little light bulbs going on above everyone's heads! Now, as Flip has already accurately pointed out, every situation is different and this unfortunately is why I cant tell you exactly how to discard your clothing and food properly in order to get you?re pursuers looking in the wrong places. I can however tell you the following. Don't discard your change of clothes. Put those on and discard the clothes you started off wearing. This is much more believable. Also discard your food in a way in which it can be found BUT that looks very natural. In other words, don?t just start dumping it all out on the ground and also try to discard mostly wrapping/packaging materials rather than actual food. Once again, I imagine even the most minimalistic of PSKs would be chalk full of useful items for evasion but I wont speculate on specific uses since I don?t know what you have in there. I realize youre a scouting so it may not be natural for you just throw your food wrapper and clothes all over the woods like it may be if you were someone less concerned with the environment. To this I say maybe it's best to carefully discard your food wrappings, clothes and other excess gear in a way that would imply that when the exercise is over you intend to return to the area to clean up your mess. The point is to be realistic about it and not be too obvious while still making sure that your pursuers see that which you have left behind.

Also let me close by saying one more thing. I almost left this out because I don't want to offend anyone else here but let me say very humbly that if you're truly surrounded then simply running as fast as you can, making lots of noise and showing fast movement in one direction is a very bad plan. This is a good idea only if you're sure ALL of your pursuers are behind you.

Good luck and be sure to let us know how it goes.