The fullpack has evolved from a canvas old and uncomfortable thing to a much better designed one these days.
The key points remain the same.
Comfort is paramount -
- pad the pack
- make sure it fit you, tighten the straps properly
- heavy items at the bottom
Ergonomics is second -
- when doing stand bys, make sure everything is easy to remove
- put a trash bag for quick removal and waterproofs the bag
- put those items you use frequently at the sides.
Label your pack - everyone has the same one
Try it on with the proper weight before the field excercise or road march.
For those with extra stuff, eg GPMG, 84mm etc, make sure you get the weight and position sorted with the extra load in place.
Strap everything down, esp in jungle ops, or you will lose items.
Bring an extra set of underwear and socks
Don't forget the fork and spoon so you do not need to open your carefully packed set.
As a reservist, the use of non-standard equipment is more permitted, so use that to pack to your comfort. I use lots of Camelbak products, and attach a small one to my SBO.
A side bag or muesli bag keeps my maps, which I store in a waterproof case.
Bring extra food and items you wish to eat on a long ops or field excercise.