I have had Armstrong "floating floor" in my trailer for 2 years and have not seen any evidence of movement. Summer in NJ and part of the winter in Fl. It survived the melting of a 1/2 gallon of ice cream on the last trip
If you consider other than the real wood make sure you drill a 1 in. hole at any place where you will have to screw down through the floor. This should take care of any movement that might tale place.
The secret is to get a good helper.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles