Doesn’t quite solve your issue, but creating a bookmark folder “trip planning” and saving all relevant sites into it and the folder onto your bookmarks bar - then right click on the new folder and click open all.
I have a few sets of pages I load like this.
Such a load of hassle though. Double clicking a name section on the title bar and closing it would be way better. Have references to windows all autosave and be accessible from any other window in a window menu.
