Thanks everyone for all of the suggestions. At this point, I am trying the Everlane and the JCrew linen (thanks BJ1111!) and possibly the Uniqlo (thanks Eliza and KKards!).
Mainelady, I do really like those hoodies, too! I've registered for the waitlist for one of them and may try to find it elsewhere. How's the sizing?
And Cat2, I looked at the options you sent too. Thanks for them. I had to laugh at your comments about the "west coast" version. I have long seen JCrew as a preppy girl and Madewell as her cooler cousin from Santa Monica. LOL!!!!
Zaeobi, you are absolutely right about too much length ruining the vibe I am looking for. It's hard to articulate (although kkards really was on target when she said she thinks of the beach as less precious). I think JCrew (perhaps with a dash of Madewell) is the clue to shape/style I am seeking.
So many of your delightful ideas were a little too refined for me, but were beautiful nonetheless. I hope these ideas help others out there!