I have always camped when I visited, so I can't help you out for lodges.

I think Hurricane Ridge, especially if the day is clear, is a must do. It is not a strenous hike whatsoever, but has exceptional views and the lodge has a lot of information. The Hoh rainforest is a lot of fun to see. I don't remember the name of the hike, but we once did a long hike around Lake Crescent that was really nice. There is a small bridge along the way the route that we decided (in June) to jump into the lake from. Let's just say, it wasn't our brightest idea and about couldn't swim out to the shore fast enough!!

There are also some hot springs around Sol Duc that I hear great things about, but I haven't personally been to.

The area is beautiful! Have fun!