Saving tabs of multiple windows in Chrome

Chrome restores all tabs when it is closed and reopened. This has been very useful for me but I got greedy. I now have multiple windows, with each window on a topic I’m search on. E.g. a window with tabs on different hotels and another window with tabs on day trips.

No perfection, but I found that Ctrl-Shift-D will bookmark all tabs into a bookmark folder, and right-clicking on a bookmark folder allows me to open all bookmarks in a bookmark folder to a new window.

Good enough for me.