I take a small cross-body bag (
inside a small, collapsible tote on the plane), a raincoat,
black pencil skirt,
black dressier pants, a second pair of pants (somewhat more casual / sturdy but NOT jeans),
black cardigan sweater jacket,
black turtleneck, two dressy tops, two somewhat causal tops, base layer (unless summer), undies, sleepwear and robe, two pairs of shoes, flip flops, scarves, and some inexpensive jewelry.