Here's our typical suitcase for 4 weeks, which also includes dressier evening attire--you can ditch that if not needed:
Me--4 dark bottoms: 1 cotton capri, 1 dressy pants/capris, 1 skirt, 1 bermuda shorts (summer) and also 1 sleeveless black knit dress, scarves (to change up the black dress), some silky/poly tops for dinner, cotton shirts, sleeveless shells, 1 3/4 cotton sweater. I mix/match adding chunky costume jewelry for dinner. 1 pair dressier (but comfy) shoes for dinner, 1 walking shoe, 1 black flats.
DH--3 bottoms: 1 khaki and 1 zip off trail paints, 1 bermuda shorts, 5 knit polos, 2 tee shirts, 1-2 dress shirts, 2 ties, 1 leather shoe, 1 low rise hiker shoes. If you have 2 nights in the same place, you can wash and hang to dry in bathroom. Most things will dry in 1 day. Cotton Polos take 2 days to fully dry in room temp air--much quicker if outside. We do not wash pants/shorts until 4-5 wearings unless something got spilled on them.