If you want to make it as easy as possible, I'd be carrying in my pack-
one fresh pair of pants,
fresh pair of socks, for each day.
One spare sports bra,
one spare tee-shirt,
and one spare fleece.
-so that's only socks, pants and three spare tops to be carried in your rucksack.
(though I have lived in european mountain huts for days on end, where there's no shower/running water - so I may be happier to be a little more grubby than most?)
Then, when I was walking, I'd be wearing -
walking boots,
(socks),
good quality walking trousers (ie. softshell - brand like mountain equipment),
sports bra,
tee-shirt, fleece,
and a hard-shell jacket.
I'd also carry in my rucksack -
a map,
compass (if you know how to use one - no point if you don't),
whistle,
headtorch,
hat,
phone & charger,
toothbrush & tooth paste,
sunscreen,
medicine,
1 litre water
snacks
(remember, you may be able to get food and water along the way, so you don't need to take too much)