i think either way he'll be unsettled, but if you do your method then at least you can pop in and see him/fuss him at regular intervals.
I put max in a room with his stuff whilst we moved, then in the new place got the landing area all neat and prepared with his food, litter box, basket, toys etc,and once everything was actually moved in, we brought max in and whilst we unpacked we were able to leave him to explore and find all his things.
Plus he very much enjoyed exploring all the empty boxes and jumping in the wrapping etc whilst we unpacked which I think helped settle him a bit!
catso is right that even though he'll be a bit unsettled, keeping him close will stress him out a lot less.
happy moving - i don't envy you in this heat!x