Hi Northern, you gave me a good tip about using a dremmel sanding drum to clean up my CS Khukri handle for comfort...so let's see if I can help on your food question.
When doing S/F selection you need to be able to intake high calories and keep moving....60 miles in 18 hours in the hills is the "peak"....but there are many other days of build up. To keep going you need to be good on "nutrition" awareness and that boils down to understanding your bodies metabolic absorbtion of calories.
What we use is 35mm photo film canisters and different coloured electric tape rapped round them to distinguish what is in each. You need to prep the canisters with a good warm water wash and divide them up into three "calorie" groups.
For your "water bottle" I buy the "Revenge" training supplement powder...the high energy drink stuff...here is the link
http://www.nicemuscle.com/revenge-energy-drink-powder-78862.htmit is balanced to give a quick absorption of calories, vitamins and stuff to help break down lactic acid created by muscle energy burn....because day after day of activity can cause serious cramps...you can tip in the powder from the cannister and I carried a plastic "spork" or as we called them "racing spoons" to stir it in and for use with the other stuff below. Trim the spoon so it can fit in the bottle neck and in the cannisters...it needs to be "tea spoon size"
but with a long handle to get to the bottom or you can make your own telescopic handle and glue it to the spoon...I carried this in my shoulder pen pocket.
Using stuff like this is the best and fastest way to enable you to stay on top of fatigue in a survival situation. Use the scoop to fill a cannister for the recommended dosage for your water bottle capacity. The shelf life on the powder id pretty good and is great for survival kit and the cannisters can be liberally scattered around your jacket pockets or webbing pouches or whatever.
Using a different coloured tape for a longer sustained calorie burn ability you need a mix of carbohydrates and protein...power bars are the handy "middle ground" for an energy release...and for longer metabolism release I would boil up brown rice and mix it with smooth peanut butter and scoop this into the alternative cannisters...using the Spork or just your fingers you can get this mix down your neck quickly whilst still moving...small regular intake helps...and also take amino acid supplement tablets to help break down and metabolise the protein...take them as guided...and they are kept in the cannisters with the third colour tape. The colours make for easy recognition of what is what when you are moving...
You need more drinks powder than rice and peanut butter but you can work out what is best for you....the rice and peanut butter is quite long lasting but watch the rice though....however the rice is the best form of energy release...you need a slow release because otherwise you are just fast loading your blood with fruit type carbo's and this creates a bad "high and low" effect.
It is a long time since I used all this stuff like I used to...but it does work.
In my day you could get old film cannisters for free from a photo developing shop...you maybe still can but with digital camera's now taking over these are getting rarer...so find a box load and look after them...they are a great size for all sorts of survival use applications. <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />