Option #1 for sure. I have moved several times with different cats and always moved the cats first. Gave them the room that would be put together last and gave them all their things (litterbox, food dishes, cat tree, bed, toys etc) and let them get use to the smell and sounds of the new place while we were moving all the other things in. Once everything was in and all the big things were situated. (basically only boxes left to put away) they were released. It was the best for all involved. They were the lease stressed and adjusted quickly.