definitely stay longer!! you'll just be settling in to the ambience after 5 days and will NOT want to leave that soon!
very few clothes & a couple of bathing suits! and just the normal personal items you'd take anywhere....camera & accesories, sunscreen lotion, basic pharmacueticals/toiletries, reading material, etc. if you need most anything...it can likely be found there.
capt. morgan's is a lovely spot...removed from the center of things...quiet and picturesque.