So Washington harbor is the place to head...? Any other spots on the "must see" list for a short (couple day) excursion..?
From the Apostles, Washington Harbor is your landfall for sure. And it offers proper docking and supplies. If you don't want to go all the way down the 3.5 mile channel (more like a fjord) to the dock, you can anchor in the Hurricane hole at Johnson Island just outside the entrance, but that's not a job to do at night. The
SS America sank nearby.... its rocky.
Remember that unless you sail straight across, you are looking at a minimum 5 day trip. So for a short one, I would stay on the SW side, perhaps going as far NE as spectacular Chippewa Harbor. But not to be missed is the natural Jacuzzi at Malone Bay.
It's bucket-list sailing, and an adventure of high order. The lighthouses alone make it special. Plan you crossing with a good weather window and you'll be golden. Also make sure that you have time to delay (or leave early) depending on conditions. We've crossed in absolutely ideal sailing conditions, and some that were rather sporty.
I'm sure you have it in chart form, but just in case, here is a very hi-rez version of the NOAA
chart