Have ceiling fans in the three upstairs bedrooms, and the upstairs hallway. Will be putting (2) 60" fans in our living room when I complete it (finishing off our 12x22 back room), won't even need AC.
Have a 60" fan directly over our bed now, but won't be able to put one in the bedroom I'm doing downstairs, the ceilings are too low (only 7'). Will be able to run the fan in the air conditioner though, even during the winter.
As far as traveling, I have a Ryobi 10" battery powered fan, runs on the same 18v batteries I have for all my tools. I can take (2) batteries and a charger, each battery will last about 8 hours with the fan on high, while the other battery will charge in about an hour.