Only with a brief look at my stuff, I can already say I will cut on the number of towels, I always bring two books (big bricks - so will cut on those), cut on the jeans (replace by convertible pant), cut on the number of bungee cords (I bring to many without using all of them and they are quite heavy ), cut on the cookset (I never used all of it), maybe also on the number of drybags or at least cut the protective sacks for my camp chair, cookware, tent... all the double protection. By exemple, my sleeping pad is in a sack which is in a dry bag containing my pillow, sleeping bag and sleeping bag ( all of those items have their own sack). Not heavy items, but it adds up... Any way, I will put them in the rackpack which is a drybag. Could you imagine the rackpack containing drybags containing protective sacks! And it's just a glimpse... I will question every items later...

I forgot to mention that part of the 70 lb is my tools and spare tubes (two), portable computer, external disk and cables, solar panel, battery packs