New subflooring for Aerolite

[RubyRamona]

Hey Gang! I am new to these forums & grateful to have found you. Just dragged home a 2004 21' Aerolite which we gutted to the walls. Hoping to get some feedback from y'all on subflooring. The lighter weight & metal framing of this trailer was appealing to us so I am trying to be very mindful of the weight of any/all installs. 3/4" PT plywood? Any worthwhile composites out there? Have a bamboo flooring going down so there is added weight there. Thank You in advance for any input. I certainly appreciate learning from others' "doings"!

[Englishman]

most rv has 5/8" plywood you may get away with 1/2" if you are going to put an additional bamboo floor on top. This may help a little on the weight. composite may be heavy than plywood.