I recently sent Kevin Kelly some info on going light and he replied:
“The premier site is Backpacking LIght, which is a paid subscription site! Backpackinglight.com
Also good is Brian Green’s. He is very creative.
But the granddaddy of ultralights is Ray Jardine. Look at his trips! Applachian Trail 7 times, Pacific Crest 3 times, Divide Trail, 3 ties, bike across America 3 times, row across ocean, ski to north pole, he’s insane. He makes his own gear super lightweight gear and recommends you do the same.
Also, check out an excellent in-depth review of rental tools on Kevin’s Cool Tools site (stump grinder $100/day, posthole digger $80/day, log splitter $100/day, etc.): https://kk.org/cooltools/archives/7072