well about all I can talk about are things I've done to reduce my pack weight but I am not sure how applicable they are for your system - everyone's system is a little different and I suspect that mine is a bit unusual
food prep: during the warmer months I go stoveless and just use a plastic bowl with a tight fitting lid for rehydration - I add water to the food to be rehydrated put on the lid and hike for a few miles before eating. Bowl also used for breakfast cereal and for dipping water. Much of the food I use is bulk packed to reduce the package weight - "5 minute" rice, instant refried beans, cereal - three bags for five days worth of food.
sleep system - here I have not found anyone to use the system that I use but I doubt it would be useful in an area without trees - basically a down insulated sling chair tied to a tree with a tarp over to keep rain off - the sleeping bag I use has arms and a draw string foot so it can be used as a jacket/long coat eliminating the need for added clothing for in camp use. Currently I am waiting on a cuben tarp to replace the tarp I currently use (a 3mx3m sylnylon tarp). I use 200 lb dyneema fishing line for my tarp lines.
loo roll - here I use the single sheet folded paper (ex:
http://www.bettymills.com/shop/product/view/Kimberly Clark Professional/KCC48280.html ) - this allows me to take only what I reasonably think I will need instead of a large roll - the paper goes into a ziplock type bag with a slit in the side that the paper is pulled through one sheet at a time. This is useful in the rain since the paper can be pulled out while holding the bag upside down keeping the paper dry
blister treatment - needle and cotton thread sanitized with rubbing alcohol (I use a small bottle of rubbing alcohol as hand sanitizer and I never carry soap). For hot spots I use a bit of athletic tape to cover the spot - stays in place better than duct tape
extra clothing - in warmer months I only take an extra pair of socks (I use thin polypro socks) and a pair of briefs - Exofficio or Under Armor
wash cloth - I use a bandanna that I also use for other things
bottles - I use recycled 1L soda bottles - a bit stronger than the water bottles - I never carry a nalgene except in the colder months when I may need a hot water bottle