Another packing cube fan. Also roll your clothing.
This is what I would include for a week at the lake.
2 pairs of shoes, one workout athletic shoe and one flat sandal. I usually wear the sandals and pack the athletic shoes because they don’t usually match my travel outfit
Black workout shorts, sports bra and 2 workout shirts. Even if you don’t workout (I always do) they are great for putting over a swimsuit, wearing as comfy clothes. This is actually what I wear most of the time, honestly.
One swimsuit, they dry. I personally do not pack a coverup but will wear the black workout shorts on top of my suit.
One basic knit dress, one pair of crop pants, probably navy or white. I usually throw in a white pair of denim shorts because I like them and another pair of cotton shorts. That pair of shorts is reasonably dressy. I add shirts that mix and match with all of the bottoms. I have this chambray tie shirt that is getting a lot of love this summer.
A light cardigan that is navy and a black zip up jacket. If I was going to Florida in the summer, I would only bring the sweater in case the restaurant is cold.
Something to sleep in, socks, and underwear.
I have a organized toiletries bag that I always keep packed. Has a small pill box where I pack an assortment of OTC medication. I dye my hair and am very picky with my shampoo and conditioner so I decant those into travel containers. I will pack a light assortment of makeup.
It will all fit into my carryon with the packing cubes. I have a lightweight tote for any overflow. But always include my kindle, headphones and do not forget your chargers! I did that last weekend and wouldn’t you know that Apple changed their chargers and my ancient iPhone was not compatible with my bil’s chargers! Luckily for me I had an extra charger somewhere in the car. Always one of those portable chargers for said devices.
Editing to say that I usually pack more than 2 workout shirts. Maybe 3, 2 short sleeves and one tank.