first, start with the kilt. Seriously, its the best hiking clothes in the history of ever! Leave your pants and any ‘spare’ clothes at home. You can lighten up even more by getting Mountain Hardwear’s ElKommando (yes, thats what they call it) Weighs ~15oz. Wear the kilt every day, it’ll dry overnight. For real, i cant say this emphatically enough - the ”ElKommando“ is friggin amazing. Ive thru hiked the AT, S2S, and done 10 Tough Mudders in my EK kilt!
then leave the boots at home. Seriously. For most trails in most places for most of the year you could wear sandals (thru hiked the Smokies and Shawnee SF in Xero Shoes z Trail sandals ~6oz for the pair).
Sometimes boots really do help (its rare, as in just the summit shoulder of Mt Washington- its a boulder field). on those occasions pick the lightest ones that have a stiff sole and are NOT waterproof. Merrill Moab Ventilators have done well for me in places like that (1.71 lbs for the pair). Get “Yanks” elastic shoe laces. The boots will be plenty tight enough on the boulder fields and will slip on/off super easy for those midnight walks (wink). No more lacing/unlacing. Keep ‘em on or not for stream crossings. They’ll walk dry in a couple miles.
I know, this is some heretical stuff... but if youre feeling bold, give it a try on a short local hike and go from there