Originally Posted by Kelor
I was also told it might be wise to bring a sports jacket in case of a last minute social event or something. I don't know about this yet.
If you have anyone in your life who may be "departing this orb" soon and whose funeral you would be expected to attend, depending on how long you are planning on being at the vacation rental, you may want to have funeral-appropriate attire with you. (FWIW, I've read that members of the Royal Family always travel with a funeral outfit.)
I now take my passport with me whenever I am traveling domestically for more than a few days, as who knows if I might need to fly to Canada or overseas, unexpectedly, on short notice. (Of course, this means I am prepared to take advantage of a cheap cruise or airfare, while I am vacationing, too.)